Malicious PDF — malware analysis report

Static analysis result for SHA-256 793ca3da6406fe52…

MALICIOUS

PDF

47.9 KB Created: 2020-08-19 17:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 351481e91948bf9043fe789c5502dda7 SHA-1: 63d1114bac53b1d8571abdd72229a5ec64bcf9ff SHA-256: 793ca3da6406fe52f6c1f61cf12b35a8ed1afa0135bd1e65b545926ebd803558
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One prominent link, 'https://ttraff.ru/pify?keyword=breville+espresso+machine+cafe+roma+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. The presence of many Shopify links, some benign and some potentially part of a link farm, further supports the SEO spam and redirection attack pattern.

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/pify?keyword=breville+espresso+machine+cafe+roma+manual
    • http://files.paddyperring.com/uploads/1/3/0/7/130776245/3638564.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/vebuzejelabivixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/37149897240.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/arcanum_of_steamworks_and_magick_obscura_mods.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/pupebevipozilowoni.pdf
    • https://cdn.shopify.com/s/files/1/0440/3209/8469/files/workplace_conflict_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/biwifutemevuxogiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/sample_snapjaw_shell.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/7618321802.pdf
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/car_chassis_design.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005790.bin
201344b2fa650db0faa3deba5f846fc3fba70788f3c05b93a7a1d71e3c42ae05
pdf-font-stream PDF embedded font (sfnt) at offset 0x5790 5364 bytes
font_01_sfnt_off000069ad.bin
34e82ad875d07c6174ee436e8ddd113491e098a8bbceca1a708952d2074209b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x69AD 15716 bytes
font_02_sfnt_off00009abf.bin
5904b2be1162e047a8b4c59df3efb9db39d2110819e1d224a7d8073d60fb651b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABF 17068 bytes