Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a502a10519de2bf…

MALICIOUS

PDF

81.4 KB Created: 2020-09-04 17:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eed5b2a8eea8e99a24253fe981557bac SHA-1: 2c5ca361f67a9badbc56d59019d432323367bfa5 SHA-256: 7a502a10519de2bf8fea3175e5485162338190bc71da320527cdcfab60093998
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains the same redirector URL. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm strategy to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=charred+form+meaning+in+tamil In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static.usrfiles.com/ugd/ad2ade_918399ed978b4189995cc8f286c038eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74c34a_c9c2221619a04554b8a1149c8d265884.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/625844_a099641ced844126b60b06cf4c70dca8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/008e52_6a9e079f709c45169c1c143010bfa89d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a2529a7cee62464ca6c87f98189e57f2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/effective_english_speaking_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0619/files/soya_beans_farming_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/kuruxulovipivelidiwokumoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6833/2959/files/ajooba_movie_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/4831/9393/files/3826070507.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/33c377_fd7f62efcb1948d2aa75a2de2100e13f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_63e4e49511cc4012abeed03232ce7efb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_16f109af16784a0ba3310f4d05027548.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/16a96a_ca82da681fb44ab782a6a7e9a855663d.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off000106b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x106B9 18872 bytes
SHA-256: 9731ad2ca303225148e2610fd734d282f800d37a7dc24fd6933c96c845fcb835
font_00_sfnt_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 8988 bytes
SHA-256: adc7d4b62a368591808934ebd9f16f4d2df4af4c67bb7a8f73d71376208b4f00
font_01_sfnt_off00007f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F36 5048 bytes
SHA-256: 9a584cff031bf687a258583fc868401bd46ae4f9a691c862c2a5c0350fcf968b
font_02_sfnt_off0000902f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902F 14304 bytes
SHA-256: 9af6dfb8c1d005a6c62d68af7ddc4fd24bf1a9aea845043399d05e45cb0611a3
font_03_sfnt_off0000b2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F7 4120 bytes
SHA-256: 7c519393c491a02f6f0afee841eaacdfcbe7cb1f1e9df341bbd913b7d0d04536
font_04_sfnt_off0000bff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_05_sfnt_off0000c9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C0 6640 bytes
SHA-256: eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0
font_06_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 13100 bytes
SHA-256: 157d5f4a638f3d039883b508d0d07a8a543d8a4b9fc2108ae71d0035ad583237
font_08_sfnt_off0001258b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258B 3840 bytes
SHA-256: 74813b761d41919fe98e20aa6196395a8f0889202086e39bb9c3e7d0ca311c38

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