Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3bb1acf15868ff…

MALICIOUS

PDF

36.3 KB Created: 2020-08-23 22:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1834fb2cd8b841e32d268f13a0596410 SHA-1: 91098d9db270a3fef1338f94074b7a0aa2ba933d SHA-256: 6f3bb1acf15868ffcd40150d25df3e79798f38902fe2944083c9b661aa2c3ac7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, and a critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'masstamilan', suggesting a lure for content or a phishing attempt. The ML classifier strongly indicated maliciousness, and the overall structure points to a link farm or SEO manipulation tactic to distribute 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=believer+cut+song++masstamilan In PDF document text
    • http://nububo.littlebluebowphotography.com/uploads/1/3/1/3/131380213/21cd5293.pdfIn PDF document text
    • http://files.4loveofbaskets.com/uploads/1/3/2/6/132681698/2119523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/biresusikimaxazamufara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/posagonikuxalagelajago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/fegisakubegulupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/6248078547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9624/2331/files/15247422119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/48001715147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/dusokigokowopafuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4025/0775/files/57087000062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/xilal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/14067123391.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4425 5108 bytes
SHA-256: a778a0ec74c3c8b3374dd04fbd28c4203678393a4f42298f09289d19a5b27367
font_01_sfnt_off0000556d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x556D 9632 bytes
SHA-256: 787c0084a65ede066e6d19341a44179cfa7102e29a20b639793ac41eb1d50eba
font_02_sfnt_off0000767d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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