Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c575fbc1aef62a…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 13:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8938cff4363119832526d4c01b342b09 SHA-1: 3fccfd790f313165f125f5d6fa6ccde8889628c4 SHA-256: c7c575fbc1aef62a82ae5fce166ba3a46fbe49341bed13220ec74730643978bd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary link, 'https://ttraff.ru/pify?keyword=career+guidance+test+pdf', is presented as a career guidance test, likely a social engineering lure. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting a link farm designed to distribute malicious content. The file's purpose is to redirect users to malicious infrastructure through these links.

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=career+guidance+test+pdf
    • http://sagixu.delaneydrywall.com/uploads/1/3/1/6/131606346/mijikexizova_puvofamilagewop.pdf
    • http://files.rkspeech.com/uploads/1/3/1/4/131438249/9075954.pdf
    • http://fegozuxaj.iwanttobeanengineer.com.au/uploads/1/3/2/6/132682883/kedazoz_wadabevenasax_saguwipure_lakoregaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/gusozesarizilavekefaxifok.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/objectives_of_berlin_conference.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/the_economist_may_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4170/files/7359855455.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/46504974326.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/dofisujuwamorexex.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/45082515374.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/leveganuvogimutofofu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/dunadojusezij.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/vodurizirejube.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/39906111363.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/nabogonasabobufupopurim.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_off00006ad1.bin
77ac0a51e2077519b3f70b36759cc6d7f0a6425ab7112a511a5bd7eab65488ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD1 5196 bytes
font_01_sfnt_off00007c8a.bin
3caec329a7c227550597e558bdf428ba136fec457a3117335176d773b070a9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8A 10300 bytes

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