Malicious PDF — malware analysis report

Static analysis result for SHA-256 2921ede3185fc2c2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-09 20:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bf1582366f1f1a738ed86bfaf12daaf SHA-1: db04b37b59004dd7bf6dbada544f0a9d59c09af4 SHA-256: 2921ede3185fc2c269c8b43d75f5e972e978e6fb7746c13b9376d0a203b8f519
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This URL is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The embedded document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure. The primary attack pattern involves tricking users into clicking a link that leads to a malicious site.

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/pify?keyword=anesthesia+machines+pdf
    • http://files.mindfulengagment.com/uploads/1/3/2/3/132302928/7e021204.pdf
    • http://files.miraclesinmassage.com/uploads/1/3/1/6/131606631/bomowirid-vejoxugek.pdf
    • http://sodilus.coachminda.com/uploads/1/3/2/3/132303382/matetilirezal.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/advantages_and_disadvantages_of_aida_model.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/45481368610.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/3ds_max_shortcuts_keys.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/le_verbe_avoir_present_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/86849651281.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/adobe_acrobat_reader_dc_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/70000790374.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/zewokugazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/97670458759.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/56330843391.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_off00006451.bin
f645e3cca9a222508620063c94c5a2fc4336383c1648a6cdcd63e185a357787a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 3652 bytes
font_01_sfnt_off00007161.bin
2ab93df1506e2853a26be9d3e9a3e3570cb386970bfeb84124dc3ad23e8fb89e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7161 5256 bytes
font_02_sfnt_off00008325.bin
5ec446e85c85999b8f2aa03d2c0077741744086bb903c00d009817ff79318c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 10168 bytes