Malicious PDF — malware analysis report

Static analysis result for SHA-256 931053b8d07d745f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 14:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e834b74c2d0a413304e99dd01002f140 SHA-1: 32e515ebf3ee81eb72b44dd05cdc9c996868e805 SHA-256: 931053b8d07d745f73f8ecb463e10b0018db2be875d30ea70065e2430566d82f
194 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing malicious redirector links, specifically pointing to 'ttraff.cc'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring users through these links, likely to a phishing or malware distribution site.

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.cc/pify?keyword=kalimba+tabs+17+pdf In PDF document text
    • http://files.bureaunl.com/uploads/1/3/0/8/130813546/ee2c885553f.pdfIn PDF document text
    • http://files.immaculataschool.org/uploads/1/3/1/4/131453247/xutagafuz_tosab.pdfIn PDF document text
    • http://files.nationalroadchurchofchrist.org/uploads/1/3/1/4/131407194/merote.pdfIn PDF document text
    • http://files.sligogreenway.com/uploads/1/3/1/4/131407135/retegopifenat.pdfIn PDF document text
    • http://files.mountweazelorwellgoode.com/uploads/1/3/1/3/131380723/51c6c6441c746.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/1/0428/8266/2553/files/69390283596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/55536930825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/xetibufulisekurex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/fukuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/lakosasejodugurifazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/cerfa_14880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8230/1094/files/janawawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/bodukaneluzobemewumov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/27370060694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5897/0280/files/healthy_weight_loss_diet_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/94342970656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/52092331737.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_off000070e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 5332 bytes
SHA-256: c63fee6d62b51de73d32f48f2516dfacc861b12966691b7f7d56c7c3317e7884
font_01_sfnt_off00008301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 9992 bytes
SHA-256: 02e53c840dd30a24749f30b2344842a5992445191f09832fd1544f3fdb9eaab5

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