Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2316c7d44bb93b4…

MALICIOUS

PDF

51.6 KB Created: 2020-09-03 21:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929e620891c08fe38e62ab5760d72f26 SHA-1: f26840592ac8ee07e0df241d70c860a0b612563a SHA-256: d2316c7d44bb93b4e5f4ca03497d860b8409d93005d43ec9adf070967affd05b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=merck+veterinary+manual+canine+distemper'. This URL is presented within the document's body text, disguised as a search result for a veterinary manual. The file also contains a PDF link farm heuristic, indicating multiple embedded links, with 'https://static.usrfiles.com/ugd/2c8d66_0e517cf24d424f3aba455976b417a39d.pdf' being the first listed. The combination of these factors suggests a social engineering attack aimed at redirecting users to potentially malicious content.

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/wix?keyword=merck+veterinary+manual+canine+distemper
    • https://static.usrfiles.com/ugd/2c8d66_0e517cf24d424f3aba455976b417a39d.pdf
    • https://static.usrfiles.com/ugd/4dbf3f_34a6decfbdae404094297b61aca79a28.pdf
    • https://static.usrfiles.com/ugd/76b6de_ec4ab90e811541c2a32020dc6d25c1d5.pdf
    • https://cdn.shopify.com/s/files/1/0457/4520/9500/files/93359690305.pdf
    • https://static.usrfiles.com/ugd/9904c2_591ba47ded7549ffad82af317acb1a84.pdf
    • https://static.usrfiles.com/ugd/a2e20a_f87b28b37845406b856a864c8290b1a4.pdf
    • https://cdn.shopify.com/s/files/1/0436/8780/5081/files/john_nash_nobel_prize_speech.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/hygromanteia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/21779941094.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/wujiromijigegavaxalez.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_off00008c2c.bin
6d2dd348b8accd543cf80505a1f01dc200d96a7e375a998dbdf08382704955cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2C 5448 bytes
font_01_sfnt_off00009ebc.bin
bc7e8c531f5ead37f36733976bfc4ca7e2c1a51b4191bf4ebfac5e01a524da01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBC 10168 bytes

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