Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87f990d05899ddf…

MALICIOUS

PDF

46.8 KB Created: 2020-08-04 20:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd275b668678cf11ea1fbe1bea26d22e SHA-1: 7fa7f7362193c1f77fccec6e572c7642c1c8bb61 SHA-256: e87f990d05899ddfb7a381d5f9e56d6ce9a1ae35969f0f85b52d04dd3c436332
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=mrc+breathlessness+scale+pdf In PDF document text
    • http://files.whatsbakingbabycakes.com/uploads/1/3/0/7/130739180/4ecd517453b80ee.pdfIn PDF document text
    • http://files.sequiturbr.com/uploads/1/3/1/3/131378852/fitonemagukivabijaka.pdfIn PDF document text
    • http://files.kranefeldpicturesink.com/uploads/1/3/1/1/131163969/kamimebopikakeko.pdfIn PDF document text
    • http://files.gawlercalisthenicsclub.com/uploads/1/3/2/6/132695492/nasijob.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/1/0428/3708/2271/files/komiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/85353932154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/51387725687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/20407583103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/48357967205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/42069087159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/kuzaloxekexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/58096448107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/algorithm_of_bisection_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/b._k._s._iyengar_yoga_the_path_to_holistic_health.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off0000644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 5388 bytes
SHA-256: 2a396ad6cabf3bc3d207311fbe4a23d32908552a69ead9082f7c0a23efec95d0
font_01_sfnt_off000076a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A0 10260 bytes
SHA-256: 438856dc75c19295b1e87402d2ce0919b60627fc00cc3c3854ccbb9efe1d926e
font_02_sfnt_off000099ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99BA 16076 bytes
SHA-256: c6e5a50beeb96386e46c13b851249bedf13903b0e4c64ff4170c933eeab0380e

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