Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb73b1785f1257c7…

MALICIOUS

PDF

51.9 KB Created: 2020-09-04 04:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a092b32a9f6e11b519bddbb6b6adfa1a SHA-1: 887d8f47d2ba5870e5716dfa958eadc9db6c3ae6 SHA-256: fb73b1785f1257c7a2a565198f217a97f60966490870eaac1e54a80a38514f34
150 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'resource capacity planning template free'. This URL redirects to `https://ttraff.me/wix?keyword=resource+capacity+planning+template+free`, which is flagged as malicious. The PDF also contains a large number of external links, many of which are benign Shopify links, suggesting a link farm or SEO poisoning tactic to mask the malicious redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=resource+capacity+planning+template+free
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/colonoscopy_surveillance_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/2922/4857/files/87866090933.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/11248931953.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/7456418717.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/strength_anatomy_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/79543092529.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/zawupiki.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/sqlite_for_windows_10_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0459/9296/8351/files/physics_project_for_class_12_topics_up_board.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/daubert_tracker_case_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/47544546287.pdf
    • https://cdn.shopify.com/s/files/1/0445/6369/3732/files/chemical_reaction_engineering_fogler.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/manly_coastalwatch_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/p90x_lean_workout_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/yu_yu_hakusho_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/ximipiwazudodeluw.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_off00008ca2.bin
7e12cc5e25c46af691127b488f21803496b9f56ffcd3060bf97c076af7e3d864
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA2 5444 bytes
font_01_sfnt_off00009f26.bin
d38dc01b7ef9947f4d7e3b93157ee1e22cfba83206e6f7aa7807a9a7c0a7d24f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F26 10244 bytes