Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec2f70e583543de…

MALICIOUS

PDF

33.7 KB Created: 2020-08-20 08:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68c3155792ff77386eefb85814c629f SHA-1: a4a20b14a2d57c02d17d03ec6028628086203f7d SHA-256: cec2f70e583543de5fd453c9f2d9292024b9771fd29471bd2db977bc177ff199
150 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 pointing to 'https://ttraff.com/pify?keyword=bedsheet+car+painting'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF link, suggesting a lure to a malicious site.

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.com/pify?keyword=bedsheet+car+painting
    • http://files.trainingspaceokemos.com/uploads/1/3/1/0/131069934/8bc5091485c20b.pdf
    • http://files.nadiaberyl.fr/uploads/1/3/0/7/130739126/juwelapasirob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/36497664156.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/siripabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/soguzakobizososina.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/tojinirufebegebija.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/kototekusub.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/account_management_resume_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/62656824097.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/topology_optimization_theory_methods_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0434/4545/2967/files/72392023830.pdf
    • https://cdn.shopify.com/s/files/1/0434/4446/9927/files/58357347598.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/fivudejidozatumovemukub.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_off000046b4.bin
43e9b1e2541eb90db926491f17152138e57364fd65ba42dcf2dd5bb8dda43aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46B4 5352 bytes
font_01_sfnt_off000058e1.bin
fc74f044d8645cf42fffefa9fecc2ad099c5195be25dfcd19bf90c09d9e73fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E1 9800 bytes

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