Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa958134fef228a5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 15:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b25f44ce32337f837809d85fe2505ef2 SHA-1: 174402da71437e6a41293b48806506f301040a07 SHA-256: fa958134fef228a5dad82c573876d86782af762e79643bab1da877eed25c7b49
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious. The presence of a 'download' button lure and embedded URLs further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=acrokeratosis+verruciformis+histology In PDF document text
    • http://files.jenkinsreidfamily.com/uploads/1/3/1/4/131437308/2b1d987a1e28a8b.pdfIn PDF document text
    • http://kizumameb.portablemagic.org/uploads/1/3/1/3/131381241/sedediledijalikema.pdfIn PDF document text
    • http://files.ccwills-author.com/uploads/1/3/0/8/130814169/zafebawowumaves.pdfIn PDF document text
    • http://files.fragadeouro.com/uploads/1/3/1/3/131383921/pabil.pdfIn PDF document text
    • http://files.supcoloradosprings.com/uploads/1/3/0/7/130740189/dusovajukox.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/1/0434/9935/6324/files/digestive_system_anatomy_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6514/3449/files/bbc_learning_english_grammar_challenge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/cancer_de_colon_fisiopatologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/34220217778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/xirede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/naruvanesonosufoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/84975471011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/17899035419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/29003051014.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 5

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_off00006588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 5512 bytes
SHA-256: 8b39932f9b29bbb869f89b88752f455e7bb9444f1c08111e57286931541767a9
font_01_sfnt_off00007831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7831 10076 bytes
SHA-256: 4ae17adf2ed5db85fd20e0670a4087259ec6355b84598a702f5a81531be3d26c

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