Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc74bcda906c8ddc…

MALICIOUS

PDF

45.5 KB Created: 2020-07-31 06:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 751b7afe8f3f225ee2d526832e7a54e3 SHA-1: 9b6961da8686a89b148ad95ceaf92b649ba6e1bb SHA-256: bc74bcda906c8ddcbfc671d57971ce57412a8de9a39d8904de0cc40bd1727299
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a link to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is to host these malicious links rather than convey legitimate information. The presence of numerous links, including one pointing to a known malicious redirector, strongly indicates an attempt to lure users to malicious 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=imperative+sentences+exercises+pdf In PDF document text
    • http://files.higginseyesurgeon.com/uploads/1/3/2/6/132696174/jogotebave-pefowogakokiv-najawudok.pdfIn PDF document text
    • http://files.connierhae.com/uploads/1/3/0/7/130775828/c79e9444c7.pdfIn PDF document text
    • http://files.swimrunning.com/uploads/1/3/0/8/130874469/ee507dfd1.pdfIn PDF document text
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.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/1/0435/1570/7551/files/lavenejufamawonijadoxop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/99300178927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/56257688308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/kimivipupivafuwarupubuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/xidataxemod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/89518710012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/32125123498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/93467974983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/13977638596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/supexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/getoweraroditawij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/59404802960.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_off000074b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 5012 bytes
SHA-256: 2d645d25803cb8dc4a103b329a95bdcb5c46e9adff540619dac417b534de9a2f
font_01_sfnt_off0000859f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859F 10304 bytes
SHA-256: c8c0c773409d318751deb3c9bbb1f2b9958657a470f9c625c74619478b51fa88

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