Malicious PDF — malware analysis report

Static analysis result for SHA-256 9274f9e4502ff837…

MALICIOUS

PDF

45.8 KB Created: 2020-08-21 05:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8af9afd8a080c2e5fe975021bd214f SHA-1: 144b6de06226d27fe34cddedc5ca63a08b4f44f6 SHA-256: 9274f9e4502ff837ab84b1a2fcda5a90fe48fbd0d1319683104976e90b411ab5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the PDF is designed to lure users into clicking through to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=borland+c+5.+02+free
    • http://files.jamesdonlon.com/uploads/1/3/2/6/132682542/15e733b0.pdf
    • http://nuwen.lornathomasphotography.com/uploads/1/3/1/6/131607095/nosure_jijurijilazo.pdf
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdf
    • http://zunazab.michelle-turner.net/uploads/1/3/1/0/131070374/bizuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/67377193580.pdf
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/sap_business_one_blueprint_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/bamukenusamasupeze.pdf
    • https://cdn.shopify.com/s/files/1/0462/4849/3205/files/char_broil_patio_bistro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/42418846145.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/45219289661.pdf
    • https://cdn.shopify.com/s/files/1/0439/5512/6430/files/edcite_answer_key_geometry.pdf
    • http://d2.alternativeto.net/dist/s/672d9b4a-24c5-e111-bcba-0025902c
    • 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_off0000669e.bin
d2be001f996a9b150e910d6ae9b46b8324ab470a0c3a69aad877e0a605045445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 5316 bytes
font_01_sfnt_off000078bf.bin
d953ea06a3b5c8d763140f71091e105c46cf65abe2009facbed18bc5273409a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 16596 bytes

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