Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bd6cd1657477f9…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 01:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1053fa06f41ef420feca3b04473ae82 SHA-1: 859b41a80c56288e5120ab19fce8f7ca27540b4e SHA-256: c0bd6cd1657477f904afd8739de9393d24171b1fceac9035c43c92c50e657cdd
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=que+son+los+nexos+disyuntivos'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDF files. This suggests a campaign to drive traffic to malicious sites, likely for phishing or malware delivery.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=que+son+los+nexos+disyuntivos
    • https://static.usrfiles.com/ugd/b8c837_20bf0c9171154a18bdc394bd83543d88.pdf
    • https://static.usrfiles.com/ugd/8b9728_506a5fc70c9c4ac0a8619565a88f58cb.pdf
    • https://static.usrfiles.com/ugd/735189_6fac4b91d1eb4d0fb921db40f2b80679.pdf
    • https://static.usrfiles.com/ugd/6116da_eee443aa47c2444fab3479c965683dcf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/dimulekuwegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/gilaturadolazeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/56378649374.pdf
    • https://cdn.shopify.com/s/files/1/0431/2304/8609/files/ziteralovugaladub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8447/files/70150950723.pdf
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/zatigobudu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/cisco_ccna_certification_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/39725748970.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/divurojisevatobizogawow.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_off000075f8.bin
58e1971b2211b278bf25e6ac04830b2f30c5c153f7e8c5a81b779e189b56c1c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 4804 bytes
font_01_sfnt_off00008674.bin
1027fa487575c664be25f88a2f256ea8d5c7777b719a72ded6f419cb9e2cc26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8674 11636 bytes

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