Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad88dfef4f5a418…

MALICIOUS

PDF

45.7 KB Created: 2020-07-24 17:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3153e73cf12315da4ef27128d95e1cde SHA-1: 3e0c7354cf7f420dfb308eb206dc573d90d87d78 SHA-256: cad88dfef4f5a4182286b66882a6fdefac8772a4f05040944428cfe90766f890
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=wapdam+ethiopian+music+video', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is largely unreadable binary data, but the presence of the malicious redirector and the link farm structure strongly suggest a malicious intent to lure users to harmful sites.

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=wapdam+ethiopian+music+video In PDF document text
    • http://files.kesselaarbv.com/uploads/1/3/1/4/131437425/1882264.pdfIn PDF document text
    • http://files.ballouhsphysics.info/uploads/1/3/2/7/132712174/rolesobo_pezizasupamokux.pdfIn PDF document text
    • http://files.ceasefireworld.com/uploads/1/3/1/3/131384136/4b5e4.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/1/0428/9177/2063/files/5301097046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/95789865650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/kotetazififizididan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/rejudutuzovabuzedid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nojib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56317886700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/vukizapodubozopil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/46999387440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/52403424883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/tiralowanujupubowov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/nupiromero.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
🗂 Part of campaign: kesselaarbv.com 3 samples

Related samples 7

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_off00007421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 5140 bytes
SHA-256: 59fbe3c3174d05b124f1657ff3cf000f721386ebb6efcc412b0fbe6915cafe45
font_01_sfnt_off00008588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8588 10552 bytes
SHA-256: eb596d35294ed8ad284b818f792c9a41fe19d5890bbeae5e6eb28d36dfa878b1

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