Malicious PDF — malware analysis report

Static analysis result for SHA-256 b163ff0f56f9d020…

MALICIOUS

PDF

47.9 KB Created: 2020-08-12 00:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c9c47f6788ef65442f67afc46e3a57b SHA-1: 8e75c0df83ce926d71e5296adce6877539e4b656 SHA-256: b163ff0f56f9d02095fc2c591aa22f8059618479b464fb3ae8b3e035c5cda8d8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wb?keyword=international%20marketing%20techniques%20pdf, which is the primary indicator of malicious intent. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDF files, likely for SEO manipulation or to obscure the malicious destination. No scripts were extracted, and the document body's content is largely unreadable beyond the embedded URLs.

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/wb?keyword=international%20marketing%20techniques%20pdf
    • http://wibabotap.visualronin.com/uploads/1/3/0/8/130814297/3ae87e6af8d3.pdf
    • http://files.hannahlynchphoto.com/uploads/1/3/1/4/131453355/fomuwowiwozi.pdf
    • http://files.aldaqah.com/uploads/1/3/1/6/131636789/garoga-minupopovu-lilurejemi-lezoz.pdf
    • http://supes.publicsportsbook.com/uploads/1/3/1/4/131437423/mivitujijawulazimoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/psicologia_del_aprendizaje_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/badewuvuwutake.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/josedotozo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/subject_verb_agreement_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/9652/2398/files/dodaretalisibagixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/online_editor_free_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/lejakivax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/backgammon_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/salesforce_lightning_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/algorithm_c_robert_sedgewick.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_off00007088.bin
3375caf2e8297a0c20b98ae4de613acf80a8879e34eaac010d2616a000ad2808
pdf-font-stream PDF embedded font (sfnt) at offset 0x7088 5580 bytes
font_01_sfnt_off00008344.bin
8b62e27991b6bc4b9caef0d81634ac2a00b2ee592d4672618dc68d81f45eb4cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 9804 bytes
font_02_sfnt_off0000a4d4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D4 4324 bytes