Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3a272eee1162cd…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 03:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ec65ac80598631ae5df63086a240299 SHA-1: 203b3c8a3547e2ffffce9b6ca745a6a71226143a SHA-256: 7b3a272eee1162cdfdb1c873b8a796fe2d42003dd3925f35bf0c0b8d317f557a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, ttraff.com, is identified as a malicious redirector. The document body, though partially corrupted, contains the URL that triggers the redirection, suggesting a lure to a malicious site. No scripts were extracted, and the PDF structure itself does not indicate specific exploitation, but rather a social engineering approach.

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.com/wix?keyword=relative+humidity+is+a+measure+of+________
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/53394758222.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/regaxoviti.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/piwew.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6758/files/george_orwell_keep_the_aspidistra_flying.pdf
    • https://cdn.shopify.com/s/files/1/0438/4437/0594/files/allen_indore_asat_online_registration_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_204e3d82abd8400ea3720132253bfcbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a63028323c847d08fe0f16678de305c.pdf
    • https://static.usrfiles.com/ugd/10a4aa_caa3e623b35a444b8e0f37ba6db9e9d9.pdf
    • https://static.usrfiles.com/ugd/3f80ec_34d4aab0c4bc4fc1990c5737d1c4c9c0.pdf
    • https://static.usrfiles.com/ugd/97368a_449a27a80d584d8b8c041c2982978cce.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_588c098356cb40539b68ae3a4f8cf933.pdf
    • https://static.usrfiles.com/ugd/b8c837_936e6d706b1745e681c286eb4167454a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e802f73904240fead7b51babab755e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09e7c95316f4fa48aca75a811768719.pdf
    • https://static.usrfiles.com/ugd/067ecb_6bd9eb5861444bcbb4882e57c6f7a2e7.pdf
    • https://static.usrfiles.com/ugd/33a2e4_eaca26b703ad40ed8daaf879390ffdce.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_bb048091ec8f45c1a33460fe0639fa40.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_off00007b9b.bin
32289f14fe204a25a6f14d9a4cbd4a9b2166c9f3f2e05aee59d368f12e9b8f68
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 5380 bytes
font_01_sfnt_off00008de1.bin
4d8ff5920bb06a8e362453c32949c4cfa92a5168d27e78621581805a6347fd74
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 11060 bytes