Malicious PDF — malware analysis report

Static analysis result for SHA-256 7226b46b70eb0368…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 02:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3a9444b58df063fb8ec74f1996d4dd3 SHA-1: b94b61f6dc25e23202c24cf69251ed11bcbec074 SHA-256: 7226b46b70eb036800cd287b5fc17fd57f059b49fed13cd907846035339a283d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also listed as an IOC. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific intent beyond link redirection.

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=hersey+blanchard+situational+leaders
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/bootstrap_cheat_sheet_grid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/nobitomujarufiwibukiboguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/civ_5_venice_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2970/files/sisabopigakemebodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/bewixusorasig.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/lotorajuzimaletitubatuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/imperio_persa_reporteros_de_la_historia.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/ramisorabagotawex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/23700538912.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/best_abs_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9416/files/96629881697.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/76154461142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.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_off000069d7.bin
7c547a7540691f655450940c8dc4680c4ffe30b2b4712e9de0173224943b1e76
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 5228 bytes
font_01_sfnt_off00007b89.bin
ee233a4be44cfdfc183357a45c2214bbdefab00b6d72ec35259331723b75af4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 10036 bytes