Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff12d1dcaa3d5b0…

MALICIOUS

PDF

51.2 KB Created: 2020-08-08 19:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2775371ce8a64a8b015a38df0faaa27 SHA-1: 1e6453c158747f2d53b63d3c2879d6efa6ed7633 SHA-256: aff12d1dcaa3d5b0aa6a07452af66e4db01f4e0ea70656164a83e8791fa30a3d
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as free book downloads, but they redirect to a malicious domain (ttraff.cc). This is a common SEO-based phishing tactic to trick users into visiting malicious sites. 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.cc/wb?keyword=the%20secret%20garden%20children In PDF document text
    • http://nadebiver.slykerfamilyministry.com/uploads/1/3/1/3/131380213/juberisal.pdfIn PDF document text
    • http://files.killingfieldsterrain.com/uploads/1/3/1/4/131453253/momesuwav.pdfIn PDF document text
    • http://files.raverstoriesproject.com/uploads/1/3/1/3/131380942/ca49b2f67b0b22.pdfIn PDF document text
    • http://files.ironcountywatershedcoalition.org/uploads/1/3/0/7/130739742/0a2acb2d47.pdfIn PDF document text
    • https://ttraff.cc/wb?keyword=the%20secret%20garden%20children's%20book%20pdfIn 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/1/0431/7508/4193/files/zatil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6341/0839/files/refimezavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/pagefunopefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/general_chemistry_atoms_first_mcmurry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/63136003933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/fl_studio_12_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/bavobevikuverojobaxofuxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/portal_knights_sea_sapphire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9867/5102/files/gypsy_witch_fortune_telling_playing_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/zipobegavirewibisugis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0841/7192/files/mcdonalds_job_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gimuwuwizarisatin.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6E 4440 bytes
SHA-256: 0450a0f5a134616e5c14f7d828a585959e5b6a72d6ffafb95994eebcb512e99c
font_01_sfnt_off00008a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A30 5604 bytes
SHA-256: f4e2ff67ad0cc555fbc52abcb747d15b1c54ecebd47f57530cc1e6653fd71a03
font_02_sfnt_off00009d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D37 10032 bytes
SHA-256: aa140ee09cceb9a5f85af473b229feff942b44cf3a325d3e6bc8e1ddee25d85f