Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d7064b3b5e2583…

MALICIOUS

PDF

40.6 KB Created: 2020-08-08 21:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f93f3a4f5ca37de2eff6bf27c2d469 SHA-1: 33952cf488bccd6568168fb7713a55d26a456b4c SHA-256: d6d7064b3b5e2583097e3bd44baf75c3b13de6acf2fd9f981edb43c7ce9f5d3b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'job application letter pdf' and the malicious URL itself. This suggests the document is designed to trick the user into clicking the link, leading them 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.com/pify?keyword=job+application+letter+pdf
    • http://files.fllworkshop.org/uploads/1/3/1/3/131380546/losibopa.pdf
    • http://files.nevacochranrd.com/uploads/1/3/0/7/130776791/gapevinozesoze_giganimon_tosugizufe.pdf
    • http://files.kiddibeat.co.za/uploads/1/3/1/6/131637308/nedigomuvosopew.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/5000545342.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/befodexaweme.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/2020_calendar_egypt_with_holidays_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/80136924357.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/9941356801.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/84376358131.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/40974839229.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/11459260403.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/fototomewezawukixixi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1401/1555/files/88926157956.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/caccia_al_tesoro_in_giardino.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/nuvufopimajix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/estadistica_descriptiva_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/mercury_outboard_service_manual.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_off000062bb.bin
ae6bb71c3323311b26ceeb3bbc29f1eb496ba0c752bac8e6a8eea4fa81c6081a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5100 bytes
font_01_sfnt_off00007420.bin
d4f55c2cc9ba0414a4481d51a86a26ef564fc1a1fe96db563e388cbfca391d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 9772 bytes

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