Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ff4ca8ad13c925…

MALICIOUS

PDF

46.8 KB Created: 2020-08-14 15:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45e749ca25815bfb36944875082f553a SHA-1: 78e0b469e7cbbb4a947c9f1fbbf5a68535b3dd76 SHA-256: 12ff4ca8ad13c9259c011328412430cff6b90d1ad76f80455c052eafb338227d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references 'Persona 5', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm used to distribute malicious content.

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.com/pify?keyword=persona+5+bringer+of+misfortune+answers
    • http://files.salolimoments.com/uploads/1/3/1/4/131406060/6535373.pdf
    • http://seturo.owossobands.com/uploads/1/3/0/9/130968973/desaxeti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/anywhere_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/jotufalapijusefigukurof.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/nobovevubafovatozuwozuka.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/882197068.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/wedaxudiwinigozopuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/4583/1335/files/utorrent_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/biblia_reina_valera_1960_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/83984544152.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/calorimetry_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44368867506.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/safiya_noble_algorithms_of_oppression.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/4067528511.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ab.bin
a7565d0bc5e78d204ce5ce3b02d6c94b85cc9ccdf3e9f699825c261634cedabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AB 3976 bytes
font_01_sfnt_off00007793.bin
c91a09f4801014404a52eb8c4e08a0fe5edcee81048504e02ead3594e882ed92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 5412 bytes
font_02_sfnt_off000089f8.bin
ec89b1bac198c085bb23137ef281f5202eb811dc617c2bb264cdd87843b9a33e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F8 10524 bytes

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