Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf294185dae9f45…

MALICIOUS

PDF

44.6 KB Created: 2020-08-01 19:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f02d042fe0fc771754df6949067aeeaa SHA-1: b284aa2ee05dc138e4caf8ca9ef275221af70ec6 SHA-256: abf294185dae9f450f64dae6d821e3a2fe18cfe766dd78d618f71e53bb00de62
194 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model and heuristics indicate it contains a large number of external links, with one link pointing to a known malicious redirector. The document body is heavily obfuscated but contains the URL that triggered the malicious redirector heuristic. The primary attack pattern appears to be a link farm, potentially for SEO manipulation or to distribute further malicious content.

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.com/pify?keyword=marky+mark+good+vibrations In PDF document text
    • http://files.jennifercass.com/uploads/1/3/0/7/130775197/kafufu-zejew.pdfIn PDF document text
    • http://files.schoolsprouts.org/uploads/1/3/2/7/132712530/penubelukosogek_vojopuz.pdfIn PDF document text
    • http://files.keebskorner.com/uploads/1/3/1/4/131454012/vuxibonoxuw_pevivigi.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/1/0435/3051/8682/files/13220546829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/dunuwazuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/66138403856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/digenovemes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/21383957924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/zosexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/tirufulokupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/mejuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7695/1957/files/valopesofubilijil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/82619317267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/aci_347_04.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/wuvunuvabud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/tiwavi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 5484 bytes
SHA-256: 008c0b0bb233b950a400b28d97502ada0d4e056dd0b5ea6760fad779a7569b36
font_01_sfnt_off000081cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CC 10540 bytes
SHA-256: 4ce871cf4c7c852e5e8cc9b272f0df027d7d5077bbab6ce211129717e306d402

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