Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b19e873437f674…

MALICIOUS

PDF

56.6 KB Created: 2020-08-10 06:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fef28860a4279c022f8866a5d844ab79 SHA-1: 2bd420706b4b55db11c32756ab45859a3ddb7ffd SHA-256: d9b19e873437f6744515e69270fd2539f3a1cca8f1a090ca052c2aa05280b328
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=importance+of+marketing+segmentation+pdf, which is likely used to redirect the user to a malicious site. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the same malicious URL.

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=importance+of+marketing+segmentation+pdf
    • http://files.kamesfishfarmingequipment.co.uk/uploads/1/3/0/7/130738569/vuziposewoma_fisemefik.pdf
    • http://files.moriahit.com/uploads/1/3/1/3/131378942/8744513.pdf
    • http://files.trailbrake.us/uploads/1/3/1/4/131409074/rosizekadub-kimusavaj-rutubidobos-wubobegez.pdf
    • http://files.charlottespurpose.com/uploads/1/3/0/8/130874489/zetarosara_zokesuwuk_tavewamilibav.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/8620699645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/23513050784.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/lurotewitulifalareru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/42932606082.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/gujadiripirotixer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4840/2081/files/11141711814.pdf
    • https://cdn.shopify.com/s/files/1/0439/6505/5134/files/salesforce_crm_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/barnett_lewis_1994_outliers_in_statistical_data.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/45154453730.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/motakogerafavepajupi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/mcas_question_search.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43034806536.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_off0000a02a.bin
f23a3db5fa3184517db1748c52b27643f144435ea114430760f14154c4fa51b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA02A 5444 bytes
font_01_sfnt_off0000b29b.bin
e2289a30f422b303023d91ecdedb59e892a68f8990535c9975a320d7cf4f4ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB29B 10024 bytes

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