Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb24f05ee9d1965…

MALICIOUS

PDF

52.1 KB Created: 2020-08-08 21:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673a979d7e9b9d012ca728c7ca7940eb SHA-1: 956bab9af8a979ad09ab798c804946a8febfaf4f SHA-256: ccb24f05ee9d1965d0a27640519a06401d848ec1ef8dd6823a6791ecd083d8a5
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to a critical heuristic firing for a redirector link pointing to ttraff.cc. Additionally, it contains a large number of embedded links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.cc/pify?keyword=file+pdf+kh%25C3%25B4ng+%25C4%2591%25E1%25BB%258Dc+%25C4%2591%25C6%25B0%25E1%25BB%25A3c, which likely serves as a gateway to further malicious content.

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.cc/pify?keyword=file+pdf+kh%25C3%25B4ng+%25C4%2591%25E1%25BB%258Dc+%25C4%2591%25C6%25B0%25E1%25BB%25A3c
    • http://boses.justintymeboots.com/uploads/1/3/0/8/130813528/joxabel.pdf
    • http://files.christiananker.com/uploads/1/3/1/3/131382141/c3637.pdf
    • http://files.clydeaspevig.com/uploads/1/3/1/1/131163738/simejawovorizov.pdf
    • http://xegon.worldclasslanguagesolutions.com/uploads/1/3/2/6/132696111/3618061.pdf
    • http://madop.3mbluemerlecorgis.com/uploads/1/3/2/3/132303189/busovurugen_sopebijo_kotafovovobi_zejux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/7719380705.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ralaguguzovepusumizus.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/15177230659.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/pelogejelijosijeloto.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/fukikosigewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/11067323752.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/gukikuvanosutane.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/bomemiritixevuvuwuxido.pdf
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/95993052084.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/94429398833.pdf
    • https://cdn.shopify.com/s/files/1/0441/2270/1976/files/kesekub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/8900370d8a754ae8c0a4a56c43f29c5a.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c8a.bin
51fa16e26addc79b2ff0530a7028e755df8704324046894ad2d8cbbf5add29f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8A 5264 bytes
font_01_sfnt_off00006df7.bin
8b2817a846d60f1e46424332f6b62567519dd224f810b95a2b53732efbc877be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF7 22116 bytes
font_02_sfnt_off00009d52.bin
f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D52 16376 bytes
font_03_sfnt_off0000b2fa.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FA 4324 bytes

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