Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f679434407f753…

MALICIOUS

PDF

46.0 KB Created: 2020-09-06 20:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00aaf5bc8accaa1a2990aa8d304cfdb3 SHA-1: eb7719b65ede9ee03ad759f5ce297899b738e078 SHA-256: b7f679434407f7531242c524ebd834f4da5825858dd37bab2daddd0812f4f86e
150 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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to trick the user into visiting this external site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=sample+forensic+audit+report
    • https://static.usrfiles.com/ugd/b8c837_b8ac8470e0cb42a2a898a88c7b77eccc.pdf
    • https://static.usrfiles.com/ugd/764aaa_393e456dbae54036acfeb56fe762739a.pdf
    • https://static.usrfiles.com/ugd/856cea_4e6222f087434736a0f2f8e43cb5203f.pdf
    • https://static.usrfiles.com/ugd/361045_c44bb4f70de549f3a4ccc3f47e9f23a9.pdf
    • https://static.usrfiles.com/ugd/4f92c1_294a58a0bfc94ceeafbcb3f56596ae5e.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/62644427267.pdf
    • https://cdn.shopify.com/s/files/1/0451/7065/5381/files/bvg_route_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/9466/1538/files/new_tamil_movies_in_tamilrockers_2018.pdf
    • https://static.usrfiles.com/ugd/ecec20_4c0b9493c01f4beaa1269cc02b558db8.pdf
    • https://static.usrfiles.com/ugd/ae15ca_8eeadce05f6641f886e72a5f67a8905d.pdf
    • https://static.usrfiles.com/ugd/6240f8_97afccc923fb4853bc9bc7d64b0d10fe.pdf
    • https://static.usrfiles.com/ugd/e8506d_fae7b030ae614ab88be3b41479eb353b.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/mizogizokenazivapol.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/bovasiroxifetuki.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_off0000753e.bin
0b6b20596a0350b50308b991e7994dea62b9b557a070189652c94f866e01d758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753E 5404 bytes
font_01_sfnt_off00008788.bin
3dc2a622e38d7cbd9675f37290e4684258cf0d6088ac8967787eb11d871f1c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 10560 bytes

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