Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f1cf5763276d35…

MALICIOUS

PDF

42.0 KB Created: 2020-08-01 05:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24d51cac12122c0bea6166a0039302e1 SHA-1: 1d25441f499f86e98990d8ff94c587ad50cb6a7e SHA-256: a6f1cf5763276d357f290e8a6f4dfeb2dadd07b8a7faafc7ba2573965168b62d
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to download further malicious content, potentially disguised as a service manual. The ML classifier also strongly flagged this PDF as malicious.

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=gmc+topkick+service+manual In PDF document text
    • http://files.tararuff.com/uploads/1/3/2/7/132712413/fazakovi.pdfIn PDF document text
    • http://files.jamespattison.org/uploads/1/3/0/9/130969699/fanonewirigepa-zevefezovu-sulutazu.pdfIn PDF document text
    • http://files.freezeyogurtbar.com/uploads/1/3/2/6/132696465/6031327.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/1/0429/9620/3679/files/19379921011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4202/8190/files/zapivovufijifejapebipobim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/43124602602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/miwuwudilunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/dorinedegamubiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8761/7447/files/maboribobawuzerojideg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/34276786784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/87893679546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/22836481198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/vukubuwopulumepopinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/80621109921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/sabejifumuseposudijunuta.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 3

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_off00005bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 5232 bytes
SHA-256: 46e5e904a819462602ffec59a567ff5ca7271ed46281f7e937f7adbafb7e8594
font_01_sfnt_off00006d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D76 14524 bytes
SHA-256: b59e1ba62ebd29ebb5ce60c922a4acf6a320bf58fcf048d9e12590aaccaa8d42

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