Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eac81100ceafb8…

MALICIOUS

PDF

38.7 KB Created: 2020-08-26 03:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ff9e5ea28f0a70fe0efbfd9e6ba1e5b SHA-1: f92d7b3167641f0b282478b358fbf15eaf6e833f SHA-256: 05eac81100ceafb8091e876203fa1b529792d426b2cb4d8b878de33a6d05b0f3
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is used in a SEO link farm to distribute other PDFs. The document also contains a heuristic for a password-protected archive lure, suggesting the user is expected to download an archive and use a provided password. The embedded URLs and the document body indicate a lure to download game-related ROMs, which is a common tactic for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=download+pokemon+omega+ruby+rom+decrypted
    • http://dopow.kierlandpop.com/uploads/1/3/2/3/132302872/warexu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/plague_inc_evolved_necroa_virus_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24810932871.pdf
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/10424226124.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/wegisatilujired.pdf
    • https://cdn.shopify.com/s/files/1/0437/4308/4705/files/minecraft_cape_editor.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/zagoxifonogiwasokumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/70656190190.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/xusilajuse.pdf
    • https://cdn.shopify.com/s/files/1/0434/6557/2514/files/45881352317.pdf
    • https://cdn.shopify.com/s/files/1/0434/6226/2936/files/52585200582.pdf
    • https://cdn.shopify.com/s/files/1/0434/5751/1590/files/27288937825.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_off00005708.bin
d2bf5f74505b16122c65ff4fdbb777a4716921d32fc8afac91940455be8fd503
pdf-font-stream PDF embedded font (sfnt) at offset 0x5708 5612 bytes
font_01_sfnt_off00006a24.bin
981c4a83a932764bfedb08107d886f5416105b8b0cee7d9216cec0bc5717c17d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 10676 bytes