Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd3a8bdc4ccedf4…

MALICIOUS

PDF

40.0 KB Created: 2020-08-08 00:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88fb3761a895d1305f98a54fa47c5b29 SHA-1: f29a0bc406e20e3ef8380e0789e089a584ae9415 SHA-256: bfd3a8bdc4ccedf47478b9ff4b999700ecc3842e2b6e57cd264c1f7e0d80d95e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links designed to redirect users to a malicious site, masquerading as a free book download. The heuristic firings indicate the presence of a malicious redirector and a link farm, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=bharat+acharya+8085+book+pdf+free+download In PDF document text
    • http://files.landfallcert.com/uploads/1/3/1/3/131379111/6170381.pdfIn PDF document text
    • http://files.islandwidefamilytours.com/uploads/1/3/1/8/131856627/a6dd41f2c6.pdfIn PDF document text
    • http://files.craftingabitofsunshine.com/uploads/1/3/0/7/130775968/fanuzobofefuwa.pdfIn PDF document text
    • http://files.grospiton.com/uploads/1/3/0/7/130775677/bd7fcb.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/1/0433/8070/3382/files/lileresa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/gagefusup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2480/9116/files/structural_composite_materials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0877/6600/files/9391147617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/15560960765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/navevagolobejowewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57515970725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/45638422875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/50655963785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/future_simple_exercises_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/27228782901.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_off00005206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5206 5972 bytes
SHA-256: 94d067bb3882ac448cba1266b8773a81eeacbfb023a5e2b0a2105405041f6e55
font_01_sfnt_off00006671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 14404 bytes
SHA-256: 2b792676939b70c21db8a2fe2641a4bf6a2bc6baeab8a41cf81d244980375828

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