Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a594d1b101ac3fb…

MALICIOUS

PDF

37.4 KB Created: 2020-08-19 14:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b21e9dce166710f812262ec70748c36b SHA-1: 27706586d8bcaa7f22e4222aa87fdc9a3537c5d5 SHA-256: 0a594d1b101ac3fb60c0c7631a27b13bb0d50e0d472f1bfc47eaaa62805cc2d4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm designed for SEO manipulation. One prominent link directs to a known malicious redirector, 'ttraff.cc', which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise the malicious intent with seemingly innocuous text.

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.cc/pify?keyword=city+bloxx+game+for+nokia+mobile
    • http://tekowubu.shopthehangup.com/uploads/1/3/1/4/131453598/633ab211ff5.pdf
    • http://nosaxi.salonboho.com/uploads/1/3/1/4/131437657/9048838.pdf
    • http://files.alaskadalmatians.net/uploads/1/3/1/8/131857655/929fe9151128605.pdf
    • http://files.nixonconstructionllc.com/uploads/1/3/2/8/132816202/zamadutetijasajapis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/94987308308.pdf
    • https://cdn.shopify.com/s/files/1/0451/2923/6645/files/amoxicilina_xarope_bula.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9720/files/75481626212.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/excuse_me_kevin_gates_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/27330748941.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/56632279641.pdf
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/nxstage_system_one_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/doctor_of_business_administration_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/setozogafobezasavumejepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0429/7375/files/jupanesenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/gta_5_ps4_gamestop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/11288798347.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_off00005054.bin
8bd4e7890132314fd75000272c8920966130b43717504feeae90f0f44d46d027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5054 5188 bytes
font_01_sfnt_off000061fd.bin
5026f341eb6824152d7c2c1da157122a78cdaf64c324e1185d58b8213b18d540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 13004 bytes

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