Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fa7cb9df2fe3a1…

MALICIOUS

PDF

37.4 KB Created: 2020-08-13 16:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4012f9a3d7cb28c19e48b65eb842c6ea SHA-1: b01913375a974a9ae614a17eedcded54e3b07227 SHA-256: b7fa7cb9df2fe3a11486a0cacf549b3b0f3ef00a63a9a0d19d784e1dc2ea1b36
120 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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords related to PDF manipulation, suggesting a lure. The presence of numerous other links to PDF files hosted on Shopify, while some are benign, indicates a link farm strategy to obscure the malicious redirector. The primary intent appears to be redirecting the user to a malicious site.

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/wb?keyword=make%20all%20pages%20same%20size%20pdf
    • http://files.scriptwriters-houston.org/uploads/1/3/0/7/130776120/xomazuwutaruse.pdf
    • http://files.phyto5.com.au/uploads/1/3/1/4/131412032/wuwaduli-puzebikofen.pdf
    • http://files.ameridragonsports.com/uploads/1/3/0/8/130813663/290909.pdf
    • http://files.changemakersbusinessacademy.com/uploads/1/3/1/6/131606431/6fdae1.pdf
    • http://files.joshuaiserhoff.com/uploads/1/3/0/8/130873876/3968640.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/lewiwidaxojuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/sivupemawanujolujixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/bullet_journal_ryder_carroll.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/wuvonadof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/sovural.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/gopoxufafaxagefozeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0418/2173/files/62428554344.pdf
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/antenna_design_parameters.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowelikuzamutaj.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_off0000547c.bin
dc56c2bcbbd4ce6b25faab9da0b59eafc431f1802897dae05e4f4e2d8b4f84dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547C 5384 bytes
font_01_sfnt_off000066d8.bin
b1cd8c6855cc3add9fc2db876e5c96bff26199db8fa991e590f38bf75d678878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 10000 bytes

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