Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7de6454f3cb8c4b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 20:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fa0f5d6b26e6f3b32174d94172af866 SHA-1: 7e4e36b4c337bfa2389af45c7e8e1efc4257baaf SHA-256: d7de6454f3cb8c4b1e59724c34929341ea7b2e1a463252c6b446c3ea765087aa
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. The primary malicious link, https://ttraff.ru/pify?keyword=former+smoker+icd+10+code, is identified as a redirector to malicious infrastructure. This suggests the document is designed to funnel users through a series of links, ultimately leading them to a malicious destination. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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.ru/pify?keyword=former+smoker+icd+10+code
    • http://files.cachevalleyresources.org/uploads/1/3/0/8/130813998/funoramoxipisover.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/4275428656.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/2638363556.pdf
    • https://cdn.shopify.com/s/files/1/0434/1147/2541/files/61280044433.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/wasidupov.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/wuben.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/sasoxesilemugobuno.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/44021227734.pdf
    • https://cdn.shopify.com/s/files/1/0435/1164/4324/files/trochanteric_bursitis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/ruxirimesijokifop.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/94652623664.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/funenuvowigotipono.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0437/3967/6821/files/difference_between_budgetary_control_and_standard_costing.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_off0000616d.bin
8c79f6509d6748d9580f91ef5694e5d8571d5044128a4a0ed65329993b1ca6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616D 5056 bytes
font_01_sfnt_off00007295.bin
ef4985ede894755cd7d6849ab421b090d2d76dd74ca3470bc5dee76e45a90cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7295 10152 bytes

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