Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec71632e3d23baa7…

MALICIOUS

PDF

33.8 KB Created: 2020-08-15 07:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4013ed31afcd9dd231775b7eabe13e9a SHA-1: 93f269541f950dcf9b4ca6a63f7f1dc9e25a6aa3 SHA-256: ec71632e3d23baa7eeea18a03e5d5a1ad0f7faf02e8a23e0804cbcfb8c4adb02
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains references to a car manual and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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=2010+chevy+impala+ltz+manual
    • http://files.sussexeyecenter.com/uploads/1/3/2/7/132740445/ff0ce374cba13.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/47704160817.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/marchen_awakens_romance_anime.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0391/files/43274509477.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/3807555109.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/14158085843.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/lunabozumez.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/statistics_mcclave_12th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/zipimeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/zosasiliterepok.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/associative_memory_in_computer_organization.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_off00004a0f.bin
165a81e2a1c1ebcafcad23a5668815e37476514bf0925663f301489249f54385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0F 5340 bytes
font_01_sfnt_off00005c2c.bin
0529ac0b5e9c13d6605b8d34535b617a1c21cb2f563c1ac09d457adb40e88758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2C 9060 bytes

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