Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df23a30bfd99521…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 21:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 992a959b7d83eccc10353bd0a4418e8b SHA-1: 8e56aa1c8153e539599277c1f0b23f11029ee42d SHA-256: 9df23a30bfd995219f24e256379a7d81e79750f1a135e1b76bd6cfe04a5f03bb
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body and extracted URLs suggest a lure related to a 'birdman book pdf', which is likely a pretext to get the user to click the malicious link. The PDF also contains a large number of external PDF links, many pointing to Shopify, which is characteristic of SEO link farm abuse.

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.cc/pify?keyword=birdman+book+pdf In PDF document text
    • http://files.birthto5partnerships.org/uploads/1/3/0/7/130775260/ripemelobokuw.pdfIn PDF document text
    • http://files.miamibeautyboutique.shop/uploads/1/3/2/6/132696233/9175067.pdfIn PDF document text
    • http://files.wisbeywoodworking.com/uploads/1/3/1/4/131407511/55a66e3446a.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/1/0437/0789/1877/files/bagigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/10409846051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/capital_expenditure_and_economic_growth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/97943262727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/dezezisogukukamamaxom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/music_an_appreciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4620/7637/files/mortal_kombat_snes_controls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/building_skills_for_the_toefl_ibt_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/bipaxaluvevukebaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/vapijusape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6578/3958/files/auditing_assurance_services_and_ethics_in_australia_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/shaymin_sky_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/tasuxiwew.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 7

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_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 5232 bytes
SHA-256: 1e7f256248919b516c8b1afb666e93fc41275d57b9a6f1f537eb103097906edf
font_01_sfnt_off0000762b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762B 10120 bytes
SHA-256: 44558ee4604e04c4f6a6967dad2611fe4011845a1da2f4fa6d8398e80a9917af

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