Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c9905aa3ab0af2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 10:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e0743459a706af40e72d6e5a258bcc9 SHA-1: c57d64dd469edce98dd564f259e2ad4c841a0b91 SHA-256: f9c9905aa3ab0af2cc08a84af41d319efcba4de15703aa9a571aa5fd5259792a
194 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which are hosted on Shopify and appear to be SEO spam. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body text, though corrupted, contains the same lure text as the malicious redirector URL, suggesting the document's primary purpose is to drive traffic to this malicious infrastructure.

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=retrieve+deleted+text+messages+android+app In PDF document text
    • http://dazupesu.baytutoring.com/uploads/1/3/1/4/131438684/jivurumidakijogo.pdfIn PDF document text
    • http://files.catholicplacemats.com.au/uploads/1/3/1/0/131070972/2ebfc3dcd5d2ae4.pdfIn PDF document text
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdfIn PDF document text
    • http://bawelager.thecatholiccrusade.com/uploads/1/3/0/7/130776407/6542647.pdfIn PDF document text
    • http://files.fbchurch.ca/uploads/1/3/1/4/131483830/870f3564c7892.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/1/0430/9411/4457/files/37046543439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/lexotilomuwuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/haemolytic_anaemia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/romoloxerokimukunurotufeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/xusojavapazifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/77927538364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/yahtzee_java_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/rusit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/color_atlas_diagnostic_microbiology.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_off00006702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6702 5416 bytes
SHA-256: 9c3a3456344bf4490fac87b2c947316b126bbf6e587d0f73a5a8fc221fa25f24
font_01_sfnt_off00007962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10120 bytes
SHA-256: ad13d06e69d56e807a4eb24be93c2664bf9ae3c6da180c599e785a6cca629d5b

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