Malicious PDF — malware analysis report

Static analysis result for SHA-256 f550efe2dae9043a…

MALICIOUS

PDF

51.2 KB Created: 2020-08-31 14:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3e0e799b5b0ea01cfd8c83579f210bc SHA-1: a75d1e902851caeef04de0e64a480647b96c9153 SHA-256: f550efe2dae9043a8a0431b7b96ba1652fa388909287de32f276217ead018b08
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a creative timeline template for Excel. This indicates a phishing or social engineering attempt to direct the user to malicious infrastructure. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score strongly suggest a malicious intent.

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.cc/wix?keyword=creative+timeline+template+excel
    • https://static.usrfiles.com/ugd/64d889_8bd9c8ee62b04c1d96590926cfec0be8.pdf
    • https://static.usrfiles.com/ugd/79e5df_8ae79ac8d5e64d1f98e3bf681bbd9659.pdf
    • https://static.usrfiles.com/ugd/f4de5e_2ff303d112244dc7a3637df7d9d1736b.pdf
    • https://static.usrfiles.com/ugd/74a852_e37179a783af425c9e2112015bc714b7.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_b527625c351e4fe79857c569414d333d.pdf
    • https://cdn.shopify.com/s/files/1/0435/4732/8664/files/npmcn_candidate_declaration_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1ffb517261f4ccfa867406991f5cb14.pdf
    • https://static.usrfiles.com/ugd/b5472a_926ca01694d14c2f8738c8aba4f7c7c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_94b99332215e4d248ef9b77a17f3bd95.pdf
    • https://static.usrfiles.com/ugd/b27199_58d5fbeba6ac40fe9e08fd2f54112cf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cbaf4432a3240aebeb8cc751c0e4c84.pdf
    • https://static.usrfiles.com/ugd/b8c837_c452b351071b4aad95019003f753fd33.pdf
    • https://static.usrfiles.com/ugd/b972d5_9884f6ee52e94854910b2e4e4141d8f4.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/
    • https://cdn.shopify.com/s/files/1/0435/4732/8664/files/npmcn_candidate_declaration_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c86.bin
f883cb6d9a555ed697f3182d0cd45f5c26c501186290a9ae27c24c921e96268b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 4932 bytes
font_01_sfnt_off00009d3f.bin
e787da5af13f2d38a5002a7c557813a2b483590aee4ac44218d18f2dc4c7af6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3F 10060 bytes