Malicious PDF — malware analysis report

Static analysis result for SHA-256 521b3c4b23363575…

MALICIOUS

PDF

48.6 KB Created: 2020-08-19 13:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fcb60ca19aad2f3eaaebc2ccf176b14 SHA-1: aff6467fa27ea69c65553d1ba918951f84689bb9 SHA-256: 521b3c4b23363575013a10c5b97b83e312d0d968beddb04ddf3f409fa7ac4eee
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=best+platform+bed+frame+wood'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0433/9286/0327/files/21005568682.pdf'. The document body, though heavily corrupted, contains fragments of the redirector URL and the Shopify URL, suggesting these are the primary lures.

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=best+platform+bed+frame+wood In PDF document text
    • http://files.allfloorsinteriors.com/uploads/1/3/0/9/130969375/kexajize.pdfIn PDF document text
    • http://foxobetus.mdwriter.com/uploads/1/3/1/4/131437462/d48a146e367036.pdfIn PDF document text
    • http://files.cypressarbor.com/uploads/1/3/1/6/131637271/8f076ba2239e.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/1/0433/9286/0327/files/21005568682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/puzunuwikopugeponapul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/55378293975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/womobabolirutenoduwof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/6637002893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/tejotota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/5822/9411/files/elna_sewing_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/fominukebefusosufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/dawuluzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/32052511092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/83115738557.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_off00007e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E71 5468 bytes
SHA-256: aab3a8b0596da95697d24a8e6b53df298b5a5db699f9d6d3698f7832beed7b28
font_01_sfnt_off00009100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9100 10708 bytes
SHA-256: 7511750acf335ad14b2d7fa3230252d6cac807637ac957ec96d497e848678c7d

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