Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbefe6cb99e4a587…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 19:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33a2e12f0a809359fe2a16f0f54fa6e5 SHA-1: b12f8f2251ff5de930aeca730bdecfc08e3bb386 SHA-256: bbefe6cb99e4a587a9309f75b939df91d5031bb61b04894fcdb78c2a1f9ec68a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'language leader pre intermediate answer key pdf' and the malicious URL itself, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wb?keyword=language%20leader%20pre%20intermediate%20answer%20key%20pdf In PDF document text
    • http://files.acdandc.org/uploads/1/3/2/6/132682640/bekufapuvizawin.pdfIn PDF document text
    • http://kibeboso.pitdawghydro.com/uploads/1/3/1/6/131636719/dusolilidutotuse.pdfIn PDF document text
    • http://files.kitkwok.com/uploads/1/3/1/8/131856815/befesafa.pdfIn PDF document text
    • http://files.bylnj.com/uploads/1/3/0/8/130874169/kuwivo-mumazako-didapovawuwap-dunokop.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/1/0439/6626/7550/files/wamabofesoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/panaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8282/5371/files/32494715976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/aqualisa_quartz_case.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/vezasobigimofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/adjective_clause_lesson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/35898481346.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 2

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_off00006484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 5560 bytes
SHA-256: c83921a2c7ae56f6fb09224d9225a506b67f64b6db8108e702ebb725b7188551
font_01_sfnt_off00007771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 10548 bytes
SHA-256: 3a20a3066dd637f71202bc27872dc377c7c1a873817da79ae17f3251589cca18

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