Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f2a7592df0df99…

MALICIOUS

PDF

47.3 KB Created: 2020-09-06 01:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb05123f8a288d0ae3a85d2428385587 SHA-1: aed004e574e765a01df7110c466dbbaa9c2bc1ac SHA-256: d6f2a7592df0df995391e1d779195bb6b8d2ec15dc25cba22df54475e12f1ecc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=to+photoshop+software'. This URL is presented in the document body, suggesting a phishing or social engineering lure. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=to+photoshop+software
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/2900741272.pdf
    • https://cdn.shopify.com/s/files/1/0447/9392/1685/files/architect_personality_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2614/3639/files/96904585714.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/rocks_and_minerals_video_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/rurigoke.pdf
    • https://cdn.shopify.com/s/files/1/0458/0658/3974/files/94233793378.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/vojifukirabojog.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_d15cb2b5a7a84f3c926f65a8c45eb65b.pdf
    • https://static.usrfiles.com/ugd/ce5d00_b889bcc8d93d48d6a60dded40c6f7c46.pdf
    • https://static.usrfiles.com/ugd/c3548c_ebd11074089147e3bb47205c0678c927.pdf
    • https://static.usrfiles.com/ugd/64bd79_0a9feaa6b2bd488bb58296ba04704cae.pdf
    • https://static.usrfiles.com/ugd/957c7b_9886b667b75a42c3ac97aba08c787471.pdf
    • https://static.usrfiles.com/ugd/0d002d_93f204cc6ca044ae87b04c7a8445135e.pdf
    • https://static.usrfiles.com/ugd/c33cdb_04530d669fd446cba0e86b107d34b4f1.pdf
    • https://static.usrfiles.com/ugd/abd6ea_e8fb4644fcea43eaa784d83d1fc1908f.pdf
    • https://static.usrfiles.com/ugd/e3ff21_97fac7fe3b9c4f698a4d8ea6745238af.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_off00007be5.bin
ce1b52ba06647715fcee00d93076abd79e62adb3cdaed4219d03c030d1ce44a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 4996 bytes
font_01_sfnt_off00008cf0.bin
4451689bbf1888fadc63f9d82c6928d32611cc7068409eeb84573bfb27abfc21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 10328 bytes

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