Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a899f73e395f42…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 15:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d9e2a2c31365e1367cbaa24fd734f5e SHA-1: 6d933cc2db9871b2cdac40278e0ac045a08ee038 SHA-256: c5a899f73e395f42057b8f832cff8f5f3dc1b0daa675a16838cbab33cf1b7fd4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised with a search query related to a 'physical fitness certificate'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify domains, suggesting a link farm or redirection strategy. The primary intent appears to be redirecting the user to malicious infrastructure.

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/wb?keyword=physical%20fitness%20certificate%20andhra%20pradesh%20pdf
    • http://files.rbibaseballnwa.com/uploads/1/3/0/8/130815228/wukunajujutejof.pdf
    • http://files.hellewoodworks.com/uploads/1/3/1/3/131380480/944a547da9e99.pdf
    • http://files.covefiinvestments.com/uploads/1/3/0/7/130775062/e375c74.pdf
    • http://files.mysticaltuscanyretreat.com/uploads/1/3/1/3/131381204/7a0cb8.pdf
    • http://files.southpawstraining.com/uploads/1/3/2/6/132683292/2905509.pdf
    • https://cdn.shopify.com/s/files/1/0435/2838/8767/files/ultraviolet_darling_death.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/5745891460.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/19430948094.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/relilasokivamizorosub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/21485433956.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/45580185980.pdf
    • https://cdn.shopify.com/s/files/1/0438/6465/3984/files/47966458408.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/sukogamelezatotidokut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/amar_ujala_epaper_uttarakhand.pdf
    • https://cdn.shopify.com/s/files/1/0432/2305/6545/files/division_bacillariophyta.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/vepikagufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1703/4134/files/18667578662.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_off0000626b.bin
b50e0b9207a1b0e00d8f23e17587f3ec8f8573b022c554fd636b6f03158c85a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 5348 bytes
font_01_sfnt_off0000747e.bin
2bba7520bd1fa2b1607942b2f5a56f37dbd749be30f1df831020982ba0906f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 9980 bytes

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