Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9862cef9d17522e…

MALICIOUS

PDF

56.2 KB Created: 2020-09-03 21:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f42358e2031fb4f55667f77ef780a22 SHA-1: 24df076b781bb9a32f3fd6741f69e4de5a1dfd6d SHA-256: a9862cef9d17522e73e5430c6227f852a535dd8f506bf23591c1f9cb013af6ce
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text suggesting it is a lure for resume templates, and includes the malicious URL. This indicates an attempt to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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.link/wix?keyword=free+word+resume+templates+microsoft+word
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/vatozaxopijeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/runukituxanomiliter.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/kowipe.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/carnatic_music_tutorial.pdf
    • https://static.usrfiles.com/ugd/99a8f2_ac127b36bd664bf6bc166b789f0d59d3.pdf
    • https://static.usrfiles.com/ugd/bdc04d_1ce1b7effec44c949939ea24ace27440.pdf
    • https://static.usrfiles.com/ugd/c068f8_9a4bc7bcbe3d4b0f9ef004f581871b7e.pdf
    • https://static.usrfiles.com/ugd/3b47cb_6734dd81798d4a3c95fc6b0f59bfe3a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c241bf2bd904e6089d9dccdb7324562.pdf
    • https://static.usrfiles.com/ugd/9904c2_556cddedbd134ede9829a3c544c30762.pdf
    • https://static.usrfiles.com/ugd/b8c837_66906439af90418b9afd88414fe53845.pdf
    • https://static.usrfiles.com/ugd/0511f5_5f542d3ae9344dd4acdf078c4618424f.pdf
    • https://static.usrfiles.com/ugd/a76634_7753f49de34c40ce934d84bc349caa78.pdf
    • https://static.usrfiles.com/ugd/de65f7_4cf7309de43b4b728196ec91ee13ab80.pdf
    • https://static.usrfiles.com/ugd/6da380_f8d2703f57c44bc9804c2f277743573e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f8215a9ea514b359c48464451532b64.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072a8.bin
a4537b2eb803c83e0486c2ddcb7f6cf63ebec199d20d1da9041db5eb44b20d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A8 5124 bytes
font_01_sfnt_off0000842d.bin
07a8d58107b44f20d01b7d88183a6d61fe26dda088c44f738ae95250b46e98ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842D 14092 bytes
font_02_sfnt_off0000b045.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB045 16144 bytes
font_03_sfnt_off0000c540.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC540 4324 bytes

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