Malicious PDF — malware analysis report

Static analysis result for SHA-256 56afea3cf9bb1a99…

MALICIOUS

PDF

44.1 KB Created: 2020-08-05 04:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 741f3685e9c0a79538d953173c357151 SHA-1: a5882a12c5553cd11a201ded90b74c0d60f48d44 SHA-256: 56afea3cf9bb1a99e74440369c5ddbe3eb5b908a1c1802dae81488eddbb8c93a
194 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a free book download, which is a common social engineering tactic. The document body and embedded URLs indicate a lure to download potentially malicious content. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=books+for+computer+science+pdf+free+download In PDF document text
    • http://files.kinbasketlakeresort.com/uploads/1/3/1/1/131163578/womemede-rizevu-zuram.pdfIn PDF document text
    • http://files.tomsaundersart.com/uploads/1/3/1/0/131071067/1757720.pdfIn PDF document text
    • http://files.risingnorthproperties.com/uploads/1/3/1/4/131407051/3233322.pdfIn 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/1/0430/8582/4154/files/65520248367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/40831334192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/49719971973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/d_d_monster_manual_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/gidunexubopug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/3094168792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/xexujubosevedirozise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/ropupamolulobigij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/jazilerarakibuguvarizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/69493578814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/ffv_job_planning_guide.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 5504 bytes
SHA-256: 0d08fd4fe22d6bc15ae63a60862a2ca14ae583fb1c73e3ed870d80f98b2a5b29
font_01_sfnt_off000080c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C3 9996 bytes
SHA-256: 0ff4dbf4daf371b5f87fe4c4d8260eff17dcdd7659b1942061bf84587048430e

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