Malicious PDF — malware analysis report

Static analysis result for SHA-256 e391e6ad3d53df1c…

MALICIOUS

PDF

41.1 KB Created: 2020-08-15 05:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 295b9fd0e2b04b55a57c4cce2498c5b9 SHA-1: 91c4a1afe9f9b12d55e69b614e3f4f843851d524 SHA-256: e391e6ad3d53df1ca7a61b1c1653dc79b2329067a5b87ac862776aaf07149dad
194 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as an employment application, directing users to a malicious redirector. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates malicious intent.

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.com/pify?keyword=application+for+employment+formal+letter In PDF document text
    • http://files.stcharlespilgrimages.com/uploads/1/3/1/4/131406610/9461571.pdfIn PDF document text
    • http://files.brainstormoz.com/uploads/1/3/0/7/130775380/xubupamijawexuru.pdfIn PDF document text
    • http://files.touchofego.com/uploads/1/3/1/3/131398447/5473341.pdfIn PDF document text
    • http://zemuzovug.chest-messages.com/uploads/1/3/2/6/132680813/zajapexepelagumadoj.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/1/0428/6483/6764/files/fakiwixabekidedugeleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/20691581993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/livro_calvinismo_e_arminianismo_evanglico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7799/0568/files/langrisser_guide_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/banopewitajivofiwexixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/90990804965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/83442657878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5600/files/12015484066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/acura_rl_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/nugenamupixuruwulubopep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0278/0057/files/vba_instr_function.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_off0000640e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 5076 bytes
SHA-256: b3d0702acb57c0db8e713522650f3508150fc4b854c03be4d6476339e3751df6
font_01_sfnt_off0000753d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753D 10044 bytes
SHA-256: 3e7ae3c990b57f6e7cfa5736b6e48cc18e0912881f52a64e1285b25205b950e1

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