Malicious PDF — malware analysis report

Static analysis result for SHA-256 772f10f0fe8f1914…

MALICIOUS

PDF

44.9 KB Created: 2020-08-22 04:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d96945509d71fd17198d963ba3b2274f SHA-1: c77a39f933d9dd44a7f290e7a1117473f2c8b7f7 SHA-256: 772f10f0fe8f1914f53f5ba12752b6903b8c408252345f530fd871020b25f159
174 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick the user into visiting a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=gmat+practice+questions+and+answers
    • http://pozeboli.jonathangillespie.net/uploads/1/3/0/8/130874379/1176941.pdf
    • http://files.abqmfg.com/uploads/1/3/0/9/130969403/7a08b2941c.pdf
    • http://files.bagsofnaturestore.com/uploads/1/3/1/4/131453268/gililujozeve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/2547/7277/files/articles_of_faith_in_islam_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6341/files/brocade_300_switch_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/84594015558.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/91191720558.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/95731568500.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/viropinufogutov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/texugupadixixokakaju.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/texas_franchise_tax_report_accounting_year.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/55965148008.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_off00006f56.bin
f7dc6879bf69da4f0a4c9d287fd4e46bda12efc310be9eeca365b1eaa19a0b1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F56 5436 bytes
font_01_sfnt_off000081c7.bin
82e11736b8871b0e7cbd71f61eaab1cca8cf74f159d4ef31dfd09f3a2a76f2d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C7 10892 bytes

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