Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e7be7ea4a2c831…

MALICIOUS

PDF

40.8 KB Created: 2020-08-28 21:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f0361253e1374f93420e85bbfd4592 SHA-1: 38eafffbcb62f4e98025b238deba5bb695d4ac40 SHA-256: 22e7be7ea4a2c8319434c34f925ced744095c8d1939801684f1c995ce778be91
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources, indicating a link farm or SEO spamming technique. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=apeman+c860+manual'. The document body, though heavily obfuscated, contains text related to a manual and a URL, reinforcing the lure. The presence of numerous Shopify links suggests an attempt to disguise malicious activity within seemingly legitimate file-sharing services.

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=apeman+c860+manual
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/app_to_convert_into_word_file.pdf
    • https://cdn.shopify.com/s/files/1/0463/3486/9661/files/mazolefav.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/64551107568.pdf
    • https://static.usrfiles.com/ugd/b8c837_a46e307927524d7b918de77948ad4da4.pdf
    • https://static.usrfiles.com/ugd/b8c837_6366f00460ca466b9f98981ffee03785.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e2bf76a4b564dcda30c20787716851e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b03a392f0c864f339b26f3c3b6d0a86f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec91ed554d8b4c7890fbe5ab775b1a12.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/2020_desi_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/2458799317.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/how_to_install_enb_new_vegas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/mofevupudarixedanosozas.pdf
    • https://cdn.shopify.com/s/files/1/0438/7805/6091/files/ruwogujelawedonesiperejek.pdf
    • https://static.usrfiles.com/ugd/b8c837_699892ac357241d5b7e9cd3e6467d43f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
    • https://static.usrfiles.com/ugd/b8c837_40c5fd9c944a481ea9dd43ed29ba0cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_aed81ba7b08a47d29e8023889db43d12.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a12568969754dccaee4bf1f88b6d39a.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_off0000624e.bin
352b644f8fd044be3fca6fe58901874cf5f49d0779da79d235dcc2e14aba0027
pdf-font-stream PDF embedded font (sfnt) at offset 0x624E 5284 bytes
font_01_sfnt_off00007429.bin
64c126e549dc1e8af910db1f831795365b67f89137098ea0e6727ba6bcddefbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7429 10016 bytes