Malicious PDF — malware analysis report

Static analysis result for SHA-256 92208d7d41ed2981…

MALICIOUS

PDF

73.3 KB Created: 2020-08-30 16:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0bb5e4b2868f9acabd041e687b394eb SHA-1: 5bec572d2c801ce1e246c2932feed376c97afb41 SHA-256: 92208d7d41ed29818f50831f0771d82ed566ec6dc73d2d9ad59b58797e753026
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/wix?keyword=intercultural+communication+a+contex'. Another critical heuristic identified a PDF link farm, with the primary link pointing to 'https://cdn.shopify.com/s/files/1/0435/8507/7405/files/93756580280.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a malicious site.

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=intercultural+communication+a+contex
    • https://cdn.shopify.com/s/files/1/0435/8507/7405/files/93756580280.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/77124026432.pdf
    • https://cdn.shopify.com/s/files/1/0463/3863/7981/files/2780409486.pdf
    • https://cdn.shopify.com/s/files/1/0464/9756/2776/files/risudizojowukunezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/53955076250.pdf
    • https://static.usrfiles.com/ugd/c3548c_5918dfa211ac45b38435919fc3cf3b23.pdf
    • https://static.usrfiles.com/ugd/6f53d7_cc4137e2e85b412ba5861ead415f9d01.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/socialism_vs_communism_vs_capitalism.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/56847839989.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/csbg_annual_report_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/nozobujozibunalaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/40573575561.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/radha_krishna_bansuri_ki_dhun_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/bikroy_apk_premium.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/15154580900.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/acetazolamida_efectos_adversos.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a9.bin
0f5911e9699088173581e980a271712f5b84aae958c8847b2eca6cf00a286980		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 4772 bytes
font_01_sfnt_off0000f4c2.bin
5ad7fea24b3b4c8f872740b4db5a6db1be6d6f492903b46064a44592c9f6d0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C2 10304 bytes

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