Malicious PDF — malware analysis report

Static analysis result for SHA-256 a364fb58254d544f…

MALICIOUS

PDF

57.0 KB Created: 2020-08-31 15:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a322b57d2f1b89d571ab013784cf09b SHA-1: 494d1075ab7429a07123626d9c3ef88c9864094c SHA-256: a364fb58254d544f656b3bad463ef334372fdb5b1e7f17ecda524aa868c0d779
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a download. The presence of a link farm further suggests a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=livery+bussid+bimasena+sdd+sempati+star In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/gikoduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/xavitoziwakopip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/battle_trip_episode_114_subtitle_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0502/6199/files/enteral_feeding_guidelines_daa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9173/9033/files/template_undangan_walimatul_khitan_cdr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/volizuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/61413104354.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/79cb75_b616d07a9588412d84d869853cd06a3b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a4e0fade0e6d45e8820a316c3a0f969c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05301a_2cc04d0008e4422b9a16963bf1238f4e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_a60fbd1863384160be9918ea9fcab99d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2274a7_1fc962e8777b4acb87f2fc4ba0222c5b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f53d49b08e8b4ac1ba547611e69cacbb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ed64d2_ffde96c7b3ba4d729cb5e0bd471446a8.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8196 2868 bytes
SHA-256: 71dfcedddd6dca67c5a4363feccf7167d3ae972506d392ed06afc8b65f639172
font_01_sfnt_off00008bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 5316 bytes
SHA-256: 97646f1211c857da6cbf96d5deb815cc7cb33fae0cfc92bbefd871defe002fdd
font_02_sfnt_off00009dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 10156 bytes
SHA-256: e39b73ac30abf00befc3be97184fc477ccefd8c3f7f33eda5b18736b3b082e6f
font_03_sfnt_off0000c092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC092 16344 bytes
SHA-256: 3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5