Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfe03f6edce5be2…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 06:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c673f6d5d22078dab1480440caaac9e SHA-1: a4a158354fbaf863cee6ff272dfe7c969149ab06 SHA-256: 8cfe03f6edce5be200066078f10808eefc1f6d2f10a4ed8b1413b1dddf9549e1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm heuristic, with numerous links to Shopify-hosted PDFs, likely intended to mask malicious activity. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack pattern is clear: redirecting the user to malicious infrastructure via a deceptive link.

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=best+wireless+earbuds+for+android+phones
    • http://bemimobur.intibrazil.com/uploads/1/3/0/7/130775169/xunofodatiboxu-zavubu.pdf
    • http://files.sisteraspensorensoneugeneoregon.com/uploads/1/3/0/8/130813979/7868489.pdf
    • http://mujidiv.memmysmommas.com/uploads/1/3/0/7/130739789/repis-rufazetoz-futesukeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/72746712798.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/gopomime.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/g_c3_bcnstige_fl_c3_bcge.pdf
    • https://cdn.shopify.com/s/files/1/0438/8900/0616/files/poserepejuxufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/jogabuzakelopixokuwujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/juwogope.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/frases_diarias_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/ansible_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/zimolirenigalobam.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_off0000677d.bin
94f536180971d730c3231cb10ed7e46c5962ba36b997f01bacc92a28354a4a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677D 5412 bytes
font_01_sfnt_off000079e3.bin
9af04cc804f738e313c2639f9c9c2153e277b75dbe7c201424b43baa06d9f375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E3 10076 bytes

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