Malicious PDF — malware analysis report

Static analysis result for SHA-256 786637202269d772…

MALICIOUS

PDF

55.2 KB Created: 2020-08-29 16:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57aa4fda77545061fe600ad285cbd3e9 SHA-1: 5af5bcb05f7b2bb0989f764418631f276ab4dda4 SHA-256: 786637202269d772580444cf32443c0c2e9ff5d1621493e14a3f220b6eb44800
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into downloading potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=basics+of+computer+mcqs+pdf 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
    • https://static.usrfiles.com/ugd/b8c837_4f64df21bf014d7ab3f38b55f712d9d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cfa91a_8ef36c4a85cb49968626886c02f13866.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e3a080b41d5e40d0879a4276ef87e7a5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/974973739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/ffxiv_shirogane_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/14839960388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/nibuxudukenegumejituvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/wefuresazumekor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8611/7032/files/baldur_s_gate_2_cheats.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3ad839911c374cd790358e18ebb86812.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b52961_cd052529df164c319c2f596f62c61ddd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c3eb8f7263154a14a9f727e1936c92c3.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://scripts.sil.org/OFLIn PDF document text

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4C 5444 bytes
SHA-256: f1501b1bf818f3b6a4d36979af330d213789b0624dbef67d1e8b830c6ffd8920
font_01_sfnt_off0000a0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A6 2560 bytes
SHA-256: ff5555ebd3a1b656d0e168cbaf29ca915033de1988c0c0bbe338cdd33dd93fe1
font_02_sfnt_off0000abbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBE 10540 bytes
SHA-256: cf33b4b5861903666d1daa6135ce16b6faac1a91e9fdaa2a08b13278b03e5c56

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