Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca224aa4ca58123…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 14:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11063daf1ba59784c4ded1cc0386fb41 SHA-1: 5c8f5764c7b177040bf270b1867442d21f874e8a SHA-256: 4ca224aa4ca58123b9cba66265422f676f87ce93ea11408e5eccf03f6f035465
194 Risk Score

Malware Insights

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

The PDF contains a deceptive link presented as educational material, which redirects to a known malicious domain (ttraff.ru). This technique is commonly used to distribute malware or phish for credentials. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination.

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=quantitative+aptitude+questions+with+answers+pdf+in+tamil In PDF document text
    • http://files.skylineeaglesfootball.org/uploads/1/3/1/4/131453919/8c36befa.pdfIn PDF document text
    • http://files.hilton-mun.org/uploads/1/3/2/6/132682883/3747986.pdfIn PDF document text
    • http://files.chapelofprayerbaptist.org/uploads/1/3/2/6/132695830/jikabamitapisudir.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/1/0430/6547/5229/files/sijebekorat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/heterosidos_cardiotonicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/dusozaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/37863102286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/dufarusaledun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/nonavedepewesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/nojefupopiwetekiroled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/61255272933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84860081798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/lobumipana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/beats_pro_wireless_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/81438704855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/56439120126.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 3

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_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 5620 bytes
SHA-256: 7a7946d170f117fd74bbe80a6b96808098a7de68327d5591cd626b08a1a82b17
font_01_sfnt_off000075c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 11172 bytes
SHA-256: a903f0e613b630e7db7ddf63d8bed8f99a24d5496d354c3808a80b10dc1afbdb

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