Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d2f23c9c2f5fde…

MALICIOUS

PDF

51.6 KB Created: 2020-08-26 00:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0baaf405b62e43d18a330348bf09df25 SHA-1: 324732bb8132e0e548ddcc165177690467773431 SHA-256: d0d2f23c9c2f5fde61365451447e889900ea8894101a4935fb4e58870ec1a5cf
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=warlock+patrons+homebrew'. Another heuristic indicated a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation. The document body contains garbled text but includes the same suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=warlock+patrons+homebrew
    • http://files.snuggledupinc.com/uploads/1/3/0/9/130969473/dc85a7281b9a1.pdf
    • http://files.brussels-computers.com/uploads/1/3/1/6/131606630/8415627.pdf
    • http://files.friendsofcherryorchardpark.org/uploads/1/3/2/3/132303219/6006201.pdf
    • http://files.br
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/vilumixajojinivalalubikaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8986/files/69739270113.pdf
    • https://cdn.shopify.com/s/files/1/0449/8967/7736/files/an_occurrence_at_owl_creek_bridge_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/masih_ft_arash_ap_goli.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/pdf_file_editor_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/4254247518.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/arm_risc_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/lapolomur.pdf
    • https://cdn.shopify.com/s/files/1/0459/1783/1319/files/can_t_icloud_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/3026399354.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008aef.bin
0e01b3bed0e43b15e691dc448375052a47c22dedd650218c0fca4b9c0afa16b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEF 5480 bytes
font_01_sfnt_off00009d7c.bin
55fe6c2abbe3b216ef66c2a36fa0113600061cab1050484bedf7e04ab8ae0de0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7C 10620 bytes