Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a1cccb0c731d91…

MALICIOUS

PDF

62.4 KB Created: 2020-07-31 06:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 562d619468e3baacc9436f50f90e7f7f SHA-1: 43e4754bc4f51009b43cc832ff86182083ed921c SHA-256: 36a1cccb0c731d915e8ce004a221e2f0fa46b7e34b1c4b97cfaa122fe5c2eaca
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm or SEO manipulation tactic, with numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=anna+achmatova+requiem+pdf', is identified as a malicious redirector. The presence of many Shopify-hosted PDF links suggests an attempt to artificially inflate search engine rankings or distribute content through a seemingly benign platform, while the malicious redirector indicates a potential for further malicious activity.

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=anna+achmatova+requiem+pdf In PDF document text
    • http://files.napervillebedbugs.com/uploads/1/3/1/6/131637546/090584493f844.pdfIn PDF document text
    • http://files.couragetogrowfarms.com/uploads/1/3/2/6/132681464/237898.pdfIn PDF document text
    • http://files.cellar27furnitureco.com/uploads/1/3/0/7/130776033/2490977.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/1/0433/0687/7080/files/fexofedome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/75014301063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/najabimelegelokawuxedajot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/jesugasatukowav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/92020925683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/libisotavat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/805830081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/73097210065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/97291966754.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_off0000b8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E6 5240 bytes
SHA-256: 286fa4da972508e12e276175716ac698b3f77b17a882acdb4c6c4afd7e791a63
font_01_sfnt_off0000ca87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA87 9952 bytes
SHA-256: cbd788b470661838fd6fb5ca131bc0b6087a6eb179924327b214898d4bbf329f

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