Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c538ecf3a50d39…

MALICIOUS

PDF

46.8 KB Created: 2020-08-01 18:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6f1cf4c828cedd935826b16f81ab6257 SHA-1: 1fc3e00b1a11e16c73763154f4d797b4130aab96 SHA-256: 77c538ecf3a50d39971b74581837caf561478772ed0515c46102ba29b5cf1c85
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature. The presence of a large number of external PDF links indicates a link farm, likely used to boost search engine rankings for malicious or phishing 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=dogpile+search+engine In PDF document text
    • http://files.ksharp1.com/uploads/1/3/1/4/131407439/joxarezepowa.pdfIn PDF document text
    • http://files.homescapejournal.com/uploads/1/3/1/4/131454024/3539948.pdfIn PDF document text
    • http://files.drheatherloenser.com/uploads/1/3/0/8/130874201/74f6d019228d0ab.pdfIn PDF document text
    • http://files.photosbysarahtucker.com/uploads/1/3/0/7/130775174/fekokirubuxugor.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/podufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/45605830219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/10508173004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/66233977731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2340/9057/files/bumomovegiduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/8634094544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/3441145176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/82016255276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/71902462932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4387/1127/files/lerogaxidet.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_off0000787b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787B 5196 bytes
SHA-256: 7d9264bbd323fce3fbc4f10ae54046545127213923ae4dbd2bd798de1a20437e
font_01_sfnt_off00008a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A28 10504 bytes
SHA-256: b6f4d72915211fcffb1b7337e7581d07a0d584c6bd0499e9b605b30a5ed4a063

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