Malicious PDF — malware analysis report

Static analysis result for SHA-256 94984dee06ca23ea…

MALICIOUS

PDF

65.6 KB Created: 2020-09-01 10:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b7d12554596194121f09e7fa83aa279 SHA-1: 6c5722ea184d5d43ee7325708505f7c4d33e4a15 SHA-256: 94984dee06ca23ea2f1e49fd9099e7040943484c3c307958325e3c6a701c9c23
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, pointing to 'https://ttraff.me/wix?keyword=sample+expression+of+interest+letter+template'. The document body, though heavily obfuscated, contains this URL and text suggesting it is a template for an expression of interest letter, indicating a social engineering lure. The file also contains a heuristic for a PDF link farm, suggesting it is part of a larger SEO poisoning campaign.

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=sample+expression+of+interest+letter+template
    • https://static.usrfiles.com/ugd/38eac1_ccfd45b16919460584ab45db781da4c5.pdf
    • https://static.usrfiles.com/ugd/fdee49_f854b05dc30a44a9badc82c3df6e4dcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ec9cfcc516241eb91aaee5f9f0ea4fd.pdf
    • https://static.usrfiles.com/ugd/e5a943_392430e6d2d84bcca859a84092699925.pdf
    • https://static.usrfiles.com/ugd/b8c837_f47ab693e40c4d2d8411d679fbc148b2.pdf
    • https://static.usrfiles.com/ugd/73c254_e589c83fe7cb4f908298fa1b5692329f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa3d4bbcf1c4a1d8a29bd1fffca3534.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a5906925fe4708b10dcf8cb987a1ed.pdf
    • https://static.usrfiles.com/ugd/45fd81_226e4bd3e72c455eade0073c16765034.pdf
    • https://static.usrfiles.com/ugd/a91264_ef231662ab764a7f9cd42f71a905d900.pdf
    • https://static.usrfiles.com/ugd/db93e9_58d9ecfac9dd4e588aa50acc70894105.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e11ff3e91fc41cd85f632d0b3ccf2ae.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8f6.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F6 2828 bytes
font_01_sfnt_off0000c2f0.bin
7a9c570c834145ce05945de4e32d58e8af9d49e819c9f787061be4546a162dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F0 5220 bytes
font_02_sfnt_off0000d49c.bin
59eaf327bef1683db7a305076fc0bac072bd8316eed66be51d3e28e77eee3ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 9992 bytes

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