Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14c6bd9e643a31f…

MALICIOUS

PDF

37.4 KB Created: 2020-08-07 19:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b509513eda1991c88e176b6bb059ebb0 SHA-1: 6fefa65cd299d15c6d6b8f93566aea82a87cb5da SHA-256: f14c6bd9e643a31f7d4fa68135d8ca2a125d69d1eccfa270180426a8433b58e2
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.cc'. This redirector is likely used to obscure the final malicious destination. The document body, though partially corrupted, suggests a lure related to a clinical microbiology PDF, which is a common tactic for phishing or malware delivery. The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=atlas+de+microbiologia+cl%25C3%25ADnica+pdf
    • http://files.vivifymultimedia.com/uploads/1/3/2/8/132814958/83422ba140b.pdf
    • http://files.danbrambilla.com/uploads/1/3/1/8/131872238/miwiv_pujedomobim_xivudagefutux.pdf
    • http://mapodugul.uottawaheal.ca/uploads/1/3/2/6/132683165/lajesosaxewope.pdf
    • http://lavixe.fleurmurphy.com/uploads/1/3/1/3/131383544/5484036.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/kewikegotisoxatidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/73506841671.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/classifying_triangles_game.pdf
    • https://cdn.shopify.com/s/files/1/0428/7073/5014/files/lozuwofusadizivesevis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5062/2358/files/circuit_training_workout_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/61818385251.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/vawulibevolatumifexan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/la_reina_de_los_caribes_emilio_salgari.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/1180538930.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/preschool_birthday_board.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/27244026431.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77084518355.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/acca_f9_syllabus_2020.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_off00005087.bin
6f279c6d35f4644130b276a19112a0140e1bb9b50861bdb405013b766b3d10cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5087 5660 bytes
font_01_sfnt_off000063b8.bin
abdb56e9879812c2a29924ad050268dc89f7666c89f7b66f364d6bf951ae96b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 10756 bytes