Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a2159f38d365f8…

MALICIOUS

PDF

43.2 KB Created: 2020-08-01 13:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a96a1fc86eae21eb944e145d425c1e1 SHA-1: 5614a260255d8a5712d498640d2ab6ce5775361e SHA-256: 41a2159f38d365f8e17e059f5480c51e751b2a59afde1e439ae4df1f500660fe
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious domain, ttraff.ru. This suggests the document is designed to act as a link farm, ultimately directing users to malicious infrastructure under the guise of providing a 'restaurant marketing plan pdf'. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=restaurant+marketing+plan+pdf
    • http://files.lavishsalonhershey.com/uploads/1/3/0/8/130874055/wukujig_xubit_gapoligaxix_bajip.pdf
    • http://files.davesexpressdelivery.com/uploads/1/3/0/8/130813948/vaxojevetafip-julowezonibe-sazodonufad-pijilugeduwemed.pdf
    • http://files.tonyluciani.ca/uploads/1/3/1/0/131070859/1155373.pdf
    • http://files.jaynejaskolski.com/uploads/1/3/0/8/130874201/futarin-xejoluraviv-tonoz-raraj.pdf
    • http://files.ecsolutionsph.com/uploads/1/3/2/7/132740270/3635995.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/51785586293.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/83433458153.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/64029408479.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4373/files/wukixosude.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/47318865241.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/75036446672.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/tolivoruxojuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/punipi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/zedujemabewomiwogot.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/36752423511.pdf
    • https://cdn.shopify.com/s/files/1/0440/5090/7286/files/71002603886.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_off00006cdb.bin
ddbd0e9b3c564a2d35ab772f73ac895f1db472e62c8a72403a80a396bdd1a7cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDB 5432 bytes
font_01_sfnt_off00007f48.bin
407db9976d1ee31f7f9369ae7bdcb1dfb937ba4fd53c1704cb35bf2f616a6d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F48 9756 bytes

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