Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3aed5ef3b4cfb1…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 03:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b1c83e484797db8ee4a198ce7ee01cf SHA-1: 4326e0b9081a29e1374d78417dedd61b45bb1e5f SHA-256: 4a3aed5ef3b4cfb1a675a9c70ff976c589da9b54f9e91ee038efae59da108678
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body itself is largely garbled but contains the same redirector URL. The primary attack pattern involves luring the user to click on these links, which likely lead to further malicious content or exploits.

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=despite+although+exercises+pdf
    • http://files.franzkiekeben.com/uploads/1/3/1/1/131163960/93f4d487087da7a.pdf
    • http://begegor.itisallaboutlife.eu/uploads/1/3/1/1/131164239/judatato.pdf
    • http://files.marblebarcrc.net/uploads/1/3/0/7/130739937/596b5b6129.pdf
    • http://files.valleychurchlife.com/uploads/1/3/0/7/130738675/973901.pdf
    • http://files.aheartfortheharvest.com/uploads/1/3/0/8/130814714/zasemafiwuru-tebipodigi-gexonazexaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/sagexonaduvabepesali.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/75004091428.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/15351175979.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/12338217858.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/52717676784.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xurekusudupedimuxutaseki.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/guwudiluxitu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/56132896838.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/wujibivedekuxozefafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/mitoraguzoxalubinufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/29457442282.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/mamekexobamavexegu.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_off0000644c.bin
cd03bd2aa54c0e30774bff16053abc99bd3ffcf6c54a1cdcbf001bdd30dfbb1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 5484 bytes
font_01_sfnt_off000076f0.bin
7c2e7741736437efaa3730a5b2000fae45715e7c45bf47c7da475dcefa92d5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 10108 bytes

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