Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f68a01ab83c60c…

MALICIOUS

PDF

51.2 KB Created: 2020-08-29 13:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7217a3afc3048250f50d98a0edb06b SHA-1: 330ad64bfe22d006c529cbe61dd55f22e1e5b27d SHA-256: 20f68a01ab83c60c3b7cc101f80a410dc480b7d9df492c96662a988e61c96304
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 a URL that appears to be a lure for a medical justification form. The document body, though heavily obfuscated, contains references to this URL and a list of other URLs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The primary malicious URL is ttraff.ru, which redirects to a page with a keyword related to a medical form, suggesting a phishing or social engineering attempt.

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=justificante+medico+imss+formato+pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/eget_aktiebolag.pdf
    • https://cdn.shopify.com/s/files/1/0438/2870/7488/files/58490791922.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/peboripanatatezukujuxis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/dentes_de_rato_agustina_bessa_luis_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/98216238185.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/26340554254.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/logical_reasoning_books_for_cat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/65423448892.pdf
    • https://static.usrfiles.com/ugd/b8c837_7392c2929cee40968e657850fd264216.pdf
    • https://static.usrfiles.com/ugd/b8c837_2686345c256747728c1e181d2843e5d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d4996c4c49c4289a8913bc5ffcd4555.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/ti_paper_trail_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/wesenefenuwibol.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
stream_005_off00009541.bin
53b99f65c8cd8be2d1d0d3593695522dba0b7a692b812f12bc49906c99732224
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9541 18332 bytes
font_00_sfnt_off00005da4.bin
56607930d8e994d3c9bd27b5ae73e65880f788109e41001f101c8c5bb8113a38
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 5140 bytes
font_01_sfnt_off00006ef5.bin
321d17224fb34ac326f5a1602a6a1d026d94f8cb64b34b855e964028614767b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 11700 bytes
font_03_sfnt_off0000b1b8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B8 4324 bytes