Malicious PDF — malware analysis report

Static analysis result for SHA-256 937ba289f0a87f6d…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 20:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67423cd103eca3c6b53cd83dbdd0c694 SHA-1: 0955674b1e2e5338c5da87c252eca8546bac7d48 SHA-256: 937ba289f0a87f6da4742d74f571192e3810dd523ed83e462d3143b1adbcd77e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=binomial+expansion+theorem+pdf', suggesting a lure to disguise malicious activity. The presence of numerous links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine ranking for 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.ru/pify?keyword=binomial+expansion+theorem+pdf In PDF document text
    • http://files.meadowlynnfarms.com/uploads/1/3/1/3/131379268/9171176.pdfIn PDF document text
    • http://ronexas.verisoftgroup.com/uploads/1/3/1/3/131383377/naxekaro-gowotoninisuku-xudisuwig-sarejusawi.pdfIn PDF document text
    • http://files.valleyfieldfarmltd.com/uploads/1/3/0/8/130813906/4534449.pdfIn PDF document text
    • http://files.omraneguedhami.com/uploads/1/3/0/8/130814126/kogikilunem.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/1/0429/7188/9817/files/58844009162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/new_headway_beginner_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/20450856753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4796/7130/files/consonant_blends_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/nofiribuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8374/0822/files/biwejutimegiwevabaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/88723150310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/structuralism_and_functionalism_in_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/tunane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/liregufunag.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 7

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_off00006e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 5400 bytes
SHA-256: 07c6d6360fd91a318e61b32e8a5fc4dec0739b8f26988073016a7efc34e7940e
font_01_sfnt_off00008096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8096 14424 bytes
SHA-256: 25695f1674cfaa1fa4bd4640fc7f144e16c531d5f892b1ef5adf22cf248f03b2

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