Malicious PDF — malware analysis report

Static analysis result for SHA-256 166447f4c5c44566…

MALICIOUS

PDF

38.6 KB Created: 2020-09-01 14:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c2060e9b8d2591c7ddf7eaba02e3a41 SHA-1: f2e53750b275128757ec0af69a37d92e9e91db34 SHA-256: 166447f4c5c44566e6643e0edb4d34587e7db63e2d68e2ce4e07bc90f9817fdc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, many of which point to external PDF documents. One URL, 'https://ttraff.com/wix?keyword=relay+with+forcibly+guided+contacts', is flagged as a malicious redirector. The presence of a large link farm and a malicious redirector suggests an attempt to manipulate search engine results or lead users to malicious content, potentially as part of a phishing or SEO scam.

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/wix?keyword=relay+with+forcibly+guided+contacts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/77941b_d5b3d953d9444e4c9ecc9107cd021cbd.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_39bd8a58682542fe8ebd374f06b736b1.pdf
    • https://static.usrfiles.com/ugd/0286dd_056649c0360743d888e010a5753bb691.pdf
    • https://static.usrfiles.com/ugd/429b25_63da17ba4e64434293bbfaede831e165.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_fa34a378c9c145659d236795dca21cbf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/60607968884.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/78416834335.pdf
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/fawukokefosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/51555274997.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/25497460429.pdf
    • https://static.usrfiles.com/ugd/3fb742_856a8a93e6504fb786df7bf936e4802c.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_217449f673294385b7558388fd2dd119.pdf
    • https://static.usrfiles.com/ugd/760101_39f2fa901d9447d1addcbcef3522705a.pdf
    • https://static.usrfiles.com/ugd/0a51c1_302c9da90e004fbca3d7d2ed9daf867c.pdf
    • https://static.usrfiles.com/ugd/87fdc7_f58e2e0cd309476194cb4274e07835c8.pdf
    • https://static.usrfiles.com/ugd/63022f_d02ef74c407a4c3f8f19af829c51c589.pdf
    • https://static.usrfiles.com/ugd/d1d005_e77bcb12f5e74cd99a0e64512f11b702.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_off000057c0.bin
0d7894d45b0ba4283f95bf37a126516a41f2402b8b9bf3b7b48f6790f8858992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 5624 bytes
font_01_sfnt_off00006afb.bin
f25306b9a75048b15f3736bfb0a8ea0cef3769c1b9162c348f673bc6700d7cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFB 10012 bytes

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