Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63e90c6123be1f4…

MALICIOUS

PDF

54.8 KB Created: 2020-09-02 11:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb04fb8fe5c6f2da74ea90899c76196a SHA-1: 7fde1fa0763e06033ce664a7f3de1d8f52288b8f SHA-256: a63e90c6123be1f44b5e9debdd76d439e231e5486777bc4143bc3aba540eed4a
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to containing a large number of external links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent URL, 'https://ttraff.ru/wix?keyword=yugioh+duel+links+deck+builder+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, reinforcing its role in the attack.

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.ru/wix?keyword=yugioh+duel+links+deck+builder+guide
    • https://static.usrfiles.com/ugd/a2c2bc_fc27e8990b414c6ba16596257cedc548.pdf
    • https://static.usrfiles.com/ugd/bae363_4b0988520669491d88bd13d9d90fb8e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_77c0ba7265a04c7b9fa0dbb5962bb5e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1035d7638ebd4db7a7bd4b6e53a0d5f9.pdf
    • https://static.usrfiles.com/ugd/0a0016_96c65afa6a754de08450e6a9e5afaff1.pdf
    • https://static.usrfiles.com/ugd/0d9a50_96ef1d05c9ee43bdbc42971643e53650.pdf
    • https://static.usrfiles.com/ugd/f95141_a76829e51b224fd7a3bb030c8ad25773.pdf
    • https://static.usrfiles.com/ugd/bb3bf9_207ec8ae0a8244a8a918e64a78bdcef1.pdf
    • https://static.usrfiles.com/ugd/493135_2c046166568643f9a39b74b1c5123dab.pdf
    • https://static.usrfiles.com/ugd/e2f197_d8455981087c4b01b8112cbd0dbd0d6b.pdf
    • https://static.usrfiles.com/ugd/067ecb_c2f911c2166c43bc8161f5a7dd4e7fc9.pdf
    • https://static.usrfiles.com/ugd/41f880_c8ae3385a49a4e7b98b2f87b67782928.pdf
    • https://cdn.shopify.com/s/files/1/0429/7906/6009/files/wipeses.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/mapamundi_con_nombres.pdf
    • https://cdn.shopify.com/s/files/1/0461/8584/0803/files/6_days_7_nights_movie_tamil_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/55095300245.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/
    • https://static.usrfiles.com/ugd/b8c8

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b41.bin
0cd67f92e27f31aae92db25edff7aad6755e826eabbe27320d20f8cdfb70487d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 4956 bytes
font_01_sfnt_off00009bf9.bin
edbdd7075353d432e86c3a26cfeb9b521b31d994988bdd24ab70d64866efdc59
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF9 10640 bytes
font_02_sfnt_off0000bfe0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE0 4324 bytes