Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a039fb33b56e35c…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 04:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86018cf68dbb48e0974c123f1dc5b4b8 SHA-1: f89cd1142609cc7b5016395cc81848b4196a59ef SHA-256: 2a039fb33b56e35c6f30ab5e52af7fdad5647d39def78a04f01aaa655be80477
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, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=avery+label+templates+8160+for+mac', is designed to lure users by appearing to offer label templates. The file also contains a PDF link farm heuristic, indicating it hosts numerous external links, many of which point to static.usrfiles.com. The primary malicious IOC is the redirector URL.

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=avery+label+templates+8160+for+mac
    • https://static.usrfiles.com/ugd/4d400c_a7f5790adde744d29f624b3ba380669f.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_20e48ab77f59489ca1e1ab3c823e074e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a15e2bb99a464cf48c44de4e05ca7842.pdf
    • https://static.usrfiles.com/ugd/b8c837_468650001d664a0993cf9f4379b8f796.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_f37fe6169d5d4541bf7b02dd7ddcb32c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9970/files/37954939410.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/70252654812.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/royksopp_remind_me.pdf
    • https://static.usrfiles.com/ugd/f55bec_6ccaee26c010462b8c1f177537be4037.pdf
    • https://static.usrfiles.com/ugd/07ef24_3bf79adfeb6440faab294d227d29179e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c96740ab6ee34f53860dfc5eaa2c8316.pdf
    • https://static.usrfiles.com/ugd/79e0dc_86dc76e196ca46128d4fc0d8ae074017.pdf
    • https://static.usrfiles.com/ugd/b8c837_0705a1967a814bac8f7f89490c9883d3.pdf
    • https://static.usrfiles.com/ugd/f4de5e_800f45434c44484b84a595f0e90a1b51.pdf
    • https://static.usrfiles.com/ugd/79e5df_e6d15909cad34d2f8aa204df7673212e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ddb8706259343fda196a32fad2e67d7.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_off00005df9.bin
365c24f63e0cee8cf00d0382826266cba042f4ef28c79f5f89c39fdb0e654fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF9 5992 bytes
font_01_sfnt_off0000725b.bin
0556c7c3eaa1fc5f65512accaae0685f8f193d224fddd1d104ee43be912dc00d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725B 9796 bytes

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