Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39d6c1c637aa7cc…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 00:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55725e2fab49b0ac6dc372847111b4e8 SHA-1: d0436383ccaa45d13812c87e159e31e0d2521b33 SHA-256: b39d6c1c637aa7cc65a8c5e11ee417c464c06827910906261d3f5e83b1bbe042
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cervical+cancer+screening+guidelines+nhs, which is used in a lure related to health guidelines. No scripts were extracted, but the presence of a malicious redirector and link farm strongly suggests a phishing or scam attempt.

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.cc/pify?keyword=cervical+cancer+screening+guidelines+nhs
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/13660161031.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/ct_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/113_bus_schedule_nj_transit.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2505/files/winaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0600/0282/files/behind_her_eyes_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/5731/3957/files/whom_should_you_see_at_the_bank_if_you_need_to_borrow_money_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/causes_and_consequences_of_deforestation.pdf
    • https://cdn.shopify.com/s/files/1/0433/8650/3324/files/bamavolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4485/files/52996210987.pdf
    • https://static.usrfiles.com/ugd/b8c837_826862b38dcf4198a515204c0634ecba.pdf
    • https://static.usrfiles.com/ugd/162fe6_47f5655e40224b20b190b814e3fc780d.pdf
    • https://static.usrfiles.com/ugd/b8c837_de27bb6799ad459982c9868d9d06c784.pdf
    • https://static.usrfiles.com/ugd/b50c55_659e6c3283bf4257a78285bc5ecaaee8.pdf
    • https://static.usrfiles.com/ugd/87d215_b463ec2acd4d427eb0d45932522052e6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006075.bin
eebb42f22dc9b19bd9c51cc9a3999cea8c9f20c387fec3dc3ed8352b303668bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 4976 bytes
font_01_sfnt_off00007144.bin
68cb28d4f43c490167b6e382e25b6f58c32b0461e2fe7e00c2e077165b2636a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7144 10020 bytes
font_02_sfnt_off00009385.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9385 4324 bytes