Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e85d1ef427a74fd…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 13:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 494abc546aa8d06661154c3593dd1f0a SHA-1: b0793573de02f411f798e42bc9f362614f5e3ed3 SHA-256: 4e85d1ef427a74fdd887e22978b20992df90affe0de35d5fa14a492a56588707
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, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL found in the heuristic. The presence of numerous links, many pointing to benign Shopify domains but aggregated under a suspicious redirector, suggests a link farm or redirection tactic to obscure the ultimate malicious destination.

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.cc/wix?keyword=lore+of+nutrition%253A+challenging+conventional+dietary+beliefs
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/81214278943.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/minecraft_fortune_enchantment.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/princeton_review_psat_practice_test.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d976cb04a84082b6f311c67079b2d0.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_f40a906206d5409d835ebd6d46161470.pdf
    • https://static.usrfiles.com/ugd/3b0c81_cd462fa938574ecd9cdc1ffebaa13469.pdf
    • https://static.usrfiles.com/ugd/0df15e_8afc16f01fc547a484f888e0302e9446.pdf
    • https://static.usrfiles.com/ugd/ce77c6_9f69b18d4da4449cbd3316efa7ec7117.pdf
    • https://static.usrfiles.com/ugd/10e3af_15c5f45b7769422b9eabd7ae14cbd1fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9409c01551b4dadba2efda7128ec2df.pdf
    • https://static.usrfiles.com/ugd/cd79e3_bab430ff66774af9882ec50f51ced658.pdf
    • https://static.usrfiles.com/ugd/dd4472_b410720d35954aaf84f40a130b7536e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3812a23079d74b67bbe662700c4bc0bd.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/sutafilepikatutofevupaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7191/files/the_best_salesman_in_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/nelinalajiwoxafifalogat.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_off00007cf9.bin
ac09785f4f652c7f1e67b42b2ccf1f79b3b15cbfc56274edc47baf9ad8ca9180
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 5576 bytes
font_01_sfnt_off00008ff4.bin
c0877010b312c90e84d9195b58df9e22afbdd2f10aa8afa52fa02900da426ebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 9996 bytes