Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f71b47ce77c51e1…

MALICIOUS

PDF

44.0 KB Created: 2020-07-31 21:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fca38598cd8c93d0cf5b1aef5ef6f12c SHA-1: ab85d682c69fbb9fe9385a78ccd5e1e751f00e9e SHA-256: 8f71b47ce77c51e162071fcd20b0f31490572f3d5afdcb737bc0b56549cb1b1d
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=tf2+killstreak+effects'. Another heuristic indicated a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The document body contains garbled text but includes the same redirector URL, suggesting it's a primary lure.

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=tf2+killstreak+effects In PDF document text
    • http://files.realthingspizza.com/uploads/1/3/1/1/131164239/3217031.pdfIn PDF document text
    • http://files.expertrelationship.com/uploads/1/3/1/4/131438180/jitokexelajar.pdfIn PDF document text
    • http://files.astros-oil.com/uploads/1/3/1/3/131382330/newaresap.pdfIn PDF document text
    • http://files.ecogcoatings.com/uploads/1/3/1/8/131871488/tujenokiwikovun_galawel_nelapuzatepoza_mugagabe.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/1/0428/9137/8854/files/79926132271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/86939348914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/69959918278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/silusozumujenonibaxuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/55165038973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0121/6163/files/sakaxuxawepuvexudesuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8970/6664/files/481809900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/6389442072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/75421887708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/kabizugorodamej.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 1

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_off00006dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 5020 bytes
SHA-256: 4445828881f987e0b38f787d14a012f0fef0897b1a9fff880c2b3b4f53bc2833
font_01_sfnt_off00007f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F17 10636 bytes
SHA-256: 81e43f9193b591d01baa7d6d1f5221dc3b74cf341c43261fc8ae726095bea959

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