Malicious PDF — malware analysis report

Static analysis result for SHA-256 266159d6ee582832…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 16:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cfdcb2b7e4fb6dff5d41133f3d385a2 SHA-1: a4fd6a1471e133903c8e172b6f630559d16a4a6b SHA-256: 266159d6ee58283227e62b2cd72fa4ed54d9002dd8f28927e52cc13607dae831
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of a 'download button' heuristic further suggests a lure to initiate a malicious download or redirect. The primary attack vector appears to be a phishing attempt leveraging a link to a redirector service.

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/pify?keyword=b.+m+sharma+physics+pdf In PDF document text
    • http://files.blackrosesdartscharity.com/uploads/1/3/1/8/131871992/jopixuda-wopotijomalodi-piboza.pdfIn PDF document text
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdfIn PDF document text
    • http://files.thestaratstar.com/uploads/1/3/2/6/132681479/puloteluwodewagifo.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/1/0434/8903/4402/files/cholesterol_metabolism_pathway.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/68153997079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/beethoven_appassionata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0243/6512/files/survey_of_accounting_4th_edition_edmonds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0631/5943/files/korin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/87518528234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/71939890161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/61590135982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/85941493404.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_off0000667e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 5544 bytes
SHA-256: 4ecd226a30f8726a15dec9315d76a3d83bb4b0b46a4c39b8bf2008842f47fe91
font_01_sfnt_off0000793f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 10192 bytes
SHA-256: 8114a5445f72648861c7fda8737579011c68066f22301be1adf1a5bbaa367bff

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