Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b21ba120caac45…

MALICIOUS

PDF

46.4 KB Created: 2020-08-05 07:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b98cf9d3501f69a077638fdc1a348a30 SHA-1: bae6927e6038509aab1b3ef9b52f8495d69ef693 SHA-256: f6b21ba120caac4552d81d361c2134bd893cc919f88bd6e3e21fff094cc25a7e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.ru/pify?keyword=blood+relation+questions+pdf+in+telugu', which is flagged as malicious. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=blood+relation+questions+pdf+in+telugu
    • http://files.nanotools.us/uploads/1/3/1/4/131407802/9910769.pdf
    • http://files.tymprojects.site/uploads/1/3/1/4/131453111/nosofaloguveta.pdf
    • http://files.larcomair.com/uploads/1/3/0/8/130814124/vawulawuted-kiguve-poxoxaranama-fovoxarud.pdf
    • http://files.r2rbayviewinncoron.com/uploads/1/3/1/4/131438071/relubim-mazidegipudili.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/26221672734.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/muwaferoxupenem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/piraxanopawase.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/13675089985.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/zovewuxifoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/70795851963.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/71029945093.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/zarujokezoxojimametuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/57046121488.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/vexinik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/florida_contractors_manual_2017_edition.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_off000076d8.bin
99f22f60db949badb4a685a6c40ab310d215bb7ed238c075265622c74d9b4f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D8 5384 bytes
font_01_sfnt_off00008931.bin
53a0b74b65c363c530440481e15aeb315a0e070163ba35fde76ef3807b07c710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8931 10408 bytes

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