Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1b6c433d54feed…

MALICIOUS

PDF

44.5 KB Created: 2020-09-02 11:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1522c54447c192a727019473316ebb21 SHA-1: d85d4fafa031c9389bdc141aa83f571fb83822fc SHA-256: 7d1b6c433d54feed6a6e5f4687757808b54c5f53c09dafef415d4d8a9f28539c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to a 'beginner guide' and the malicious URL, suggesting a social engineering lure. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links, further supporting the malicious redirector pattern. No scripts were extracted from this sample.

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=knights+chronicle+beginner+guide+2019
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/machine_screw_head_types.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/68870490065.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/74550370898.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/sedenazewofikubazoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/how_to_convert_local_image_to_base64_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/watawisuxamunowepura.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5071/files/gunakufumutizixiligasuzug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/bagaleb.pdf
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/98068177865.pdf
    • https://static.usrfiles.com/ugd/286fb8_71686f5e839941499ec4df5ff77c6a35.pdf
    • https://static.usrfiles.com/ugd/c5d40f_2ce53811ebea44b5b3b8c8d94f294a84.pdf
    • https://static.usrfiles.com/ugd/1d64af_828db1f4ef46409c9e6d1c6493c2c2fe.pdf
    • https://static.usrfiles.com/ugd/08fe48_4a14653558394bc3bcdcd553567b7d47.pdf
    • https://static.usrfiles.com/ugd/b8c837_267e9145901648b7ae947001f0a05404.pdf
    • https://static.usrfiles.com/ugd/3cb679_d15f4ee71af74320b91b42935559a5c3.pdf
    • https://static.usrfiles.com/ugd/8127dd_bf249213092848ab9a7b41a6bad1d200.pdf
    • https://static.usrfiles.com/ugd/b8c837_044e78700e9f47cb857e1dc0d1e58284.pdf
    • https://static.usrfiles.com/ugd/9421c8_99821dd80feb4b4f8920f1aa52b10da7.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_off00006e7a.bin
3ba04460f3c7f793fcb923fd72ab563e3eb4038c174f6497f3367f6be727566d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 5584 bytes
font_01_sfnt_off0000817a.bin
403ddabcb7f576d90e22d6ee829d5efb2cab888751048968c384093786831352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 10472 bytes

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