Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc79efef8109ec9a…

MALICIOUS

PDF

53.2 KB Created: 2020-08-24 13:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d510f341aaf89a0ea1c04935003e9f13 SHA-1: 026bb8c71649ab3d232317a235eb8980a9fe54d1 SHA-256: bc79efef8109ec9aea5358fff38ca0e73e32f069756091ff8603df81fe2ed712
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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=anemia+ferropriva+infantil+pdf In PDF document text
    • http://files.wellsburgchamber.com/uploads/1/3/1/3/131398145/ccf7c9.pdfIn PDF document text
    • http://files.mrsbrummer.com/uploads/1/3/0/7/130738696/seramokakevuzilo.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/1/0432/2125/4312/files/61721900682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/43027083170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/68103167736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/sazirokeketoxuwizew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/international_durastar_4300_owner_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/photoredox_catalysis_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9788/1766/files/chennai_times_today_epaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/mazexaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/31868941353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/61468766512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8097/3477/files/53454201870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0751/6565/files/q_see_manuals.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 6

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_off00009461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9461 5060 bytes
SHA-256: e107202b4889204fc1aface6462e5e989a2e30d78c2d842d19ac9a78e430dd8c
font_01_sfnt_off0000a57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57E 10160 bytes
SHA-256: 380ffeb752ef28dba46f0e4e6778e58d9a7730e3a152e2cfb478f44abaefcc63

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