Malicious PDF — malware analysis report

Static analysis result for SHA-256 892562ae886bbe04…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 15:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c91e918eef7b53e428e2030b9916ec SHA-1: 3ea6a2796947e619c026c690ce5ce6cd17c9493f SHA-256: 892562ae886bbe0434b890e2393116c442b4c54dc08a1d344cdd0aea6d718153
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which are part of a link farm designed to direct users to external sites. One of these links, 'https://ttraff.ru/wix?keyword=architect+portfolio+template+pdf', is flagged as a known malicious redirector. The document's structure and the presence of many Shopify-hosted PDF links suggest a tactic to inflate search engine rankings or distribute malicious content under the guise of legitimate templates.

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.ru/wix?keyword=architect+portfolio+template+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0939/9193/files/adobe_illustrator_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/zedozozonarimifefimimope.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/65621658903.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/difizesigomudorisuzonigeg.pdf
    • https://static.usrfiles.com/ugd/8127dd_e57ba31c0033409e9b9cac46b6fdb4c6.pdf
    • https://static.usrfiles.com/ugd/81d6a4_3f4ecd141bb146c6bb04c089f8880376.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cdb6847933b43199d51d19747e5f3ae.pdf
    • https://static.usrfiles.com/ugd/fe83c3_97080387dcb64fc285542d17421901b3.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_ace6671b93cf45a494d32da7abbbb498.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4b4e6ad63e74aae84127cfbd282512b.pdf
    • https://static.usrfiles.com/ugd/ecec20_37fd1b62f1aa42ac98781cc7b127cc61.pdf
    • https://static.usrfiles.com/ugd/225520_26bcde6696fe42d187ee1362b69a167b.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7b.bin
0443c597d079125b6532ed043d8233414fd353faee34e890910fb38b953277ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 5204 bytes
font_01_sfnt_off00007006.bin
42d170a04974096d3610db243016be2ae5487c7a444e313628da1b4f91e78363
pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 10092 bytes