Malicious PDF — malware analysis report

Static analysis result for SHA-256 b858e391c0bf950a…

MALICIOUS

PDF

40.3 KB Created: 2020-09-08 16:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b1130b19feddd137082e8874757fd19 SHA-1: 732958fd7ad92f7d62f01b1e0d482ffc1ce22a17 SHA-256: b858e391c0bf950aca2c2b5636cb000ea4093de3e2a7ac5f6dd239d52955a0d0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/pify?keyword=php+design+patterns+cheat+sheet'. This URL is presented within the document body, disguised as a technical resource. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to static.usrfiles.com, likely to manipulate search engine results. The primary malicious intent appears to be redirecting users to potentially harmful content via the ttraff.me domain.

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.me/pify?keyword=php+design+patterns+cheat+sheet
    • https://static.usrfiles.com/ugd/accd1f_893b9d54f54949fab597fd1e8fda42f8.pdf
    • https://static.usrfiles.com/ugd/1479de_ae10311ad7f84b4fb65748b676116998.pdf
    • https://static.usrfiles.com/ugd/73c254_b87214cf84224195b308da14cb520066.pdf
    • https://static.usrfiles.com/ugd/2274a7_9ec5533060884a3595a7257db221ce88.pdf
    • https://static.usrfiles.com/ugd/8e9e2f_605dc9421a2d4cb8902e9d97cd1bf139.pdf
    • https://static.usrfiles.com/ugd/4733ca_adfab534a9a54d93b23b498c3058a10c.pdf
    • https://static.usrfiles.com/ugd/3649d2_2267b0f98d694c9383c231a9b8cc69a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fd14edd0c424e399f80c1a2b0f6c6e0.pdf
    • https://static.usrfiles.com/ugd/6290de_809e740d72fa42c8b41c017e7702931f.pdf
    • https://static.usrfiles.com/ugd/0a0016_b106ee18063e4b30869eabfc10fdbef0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2f3e755c7684819adf616f6772488ab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/kovoluvawipun.pdf
    • https://cdn.shopify.com/s/files/1/0460/7020/2532/files/39378462534.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/17015783719.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/melawibolopes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/reformed_theological_seminary_free_online_classes.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_off00006057.bin
72a388ad64b535557e1a3385b6e3c5e52583562b451c0a107850701195d66c32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 5304 bytes
font_01_sfnt_off0000725e.bin
e78f6eee4f79b543f66e0ea8eee9a7908662c94d45ea360d21ac0a46f3666a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 9988 bytes

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