Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d9765677269377…

MALICIOUS

PDF

37.2 KB Created: 2020-08-30 15:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36791a7a31ef0ff5a26f5ff06c232176 SHA-1: cbb66c95ed3b749caf6e91380991c7104a318253 SHA-256: 97d9765677269377531f4907e35a4f92ec9e259625feda68f221ffbb7f7a94a1
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/wix?keyword=whitfield+profile+30+pellet+stove+tr'. Another critical heuristic indicates a PDF link farm, suggesting the document is designed to drive traffic to various external sites, likely for SEO spam or phishing purposes. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=whitfield+profile+30+pellet+stove+tr
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/1650372110.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/bakotuzokalapizomutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/gewogomepituja.pdf
    • https://static.usrfiles.com/ugd/ae15ca_fb2609de1fd247a39e614c624608aba7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f535ef80b684449da6f47851167064a5.pdf
    • https://static.usrfiles.com/ugd/b13fd1_6289f26de2de4a8b9f21fd8f39bb07d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_82d1aec97a9741bb9f23b1b8250a3e55.pdf
    • https://static.usrfiles.com/ugd/b47706_672d0926433247d0b46b1015402c2565.pdf
    • https://static.usrfiles.com/ugd/b7306e_24e8ea03ca7f4dfe9f1f6b92b7ffec7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_850ec3e7c2c2438c83d9a75487deb7bc.pdf
    • https://static.usrfiles.com/ugd/9d869b_31575568dd66472c8c46f5f4a100a0dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9616aa18dc914bb6bb01111b6d486959.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11d34bfef5b4b889ad007d69733c5ae.pdf
    • https://static.usrfiles.com/ugd/05900a_6b3ccc27539c4cd891e3633456be6175.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_off0000531e.bin
fffb348f63edb44c84ffc068f9f290135c2bd91db68e60ab8889c8a419f0ea33
pdf-font-stream PDF embedded font (sfnt) at offset 0x531E 5300 bytes
font_01_sfnt_off00006537.bin
b21db6cf70569f3f31590e86992c0307541324054deb082eaef97ce84e85521f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 10696 bytes