Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca5e31c758defef…

MALICIOUS

PDF

57.0 KB Created: 2020-08-15 22:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8cc06b913ee194c23031c0495331d33 SHA-1: a23c9e7ec06103879f874b3e207e2d8d18a1b0ed SHA-256: 2ca5e31c758defef5f25d4e9c528248bdc55f9c8c97a49192e2c924ba5197426
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This link is presented within the document body, disguised as a PDF download for 'agricultural economics objective questions'. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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/wb?keyword=agricultural%20economics%20objective%20questions%20pdf
    • http://files.jkcakecreations.co.uk/uploads/1/3/1/4/131407164/301c4a298.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/waferafumol.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/life_cycle_of_ascomycetes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/nonujolobefakofedok.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/77574110352.pdf
    • https://cdn.shopify.com/s/files/1/0440/0264/0030/files/nudos_mentales_bernardo_stamateas_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/ap_transco_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/6285/1749/files/career_paths_cooking_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/letuxogezizibebiwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/7155865227.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091b6.bin
42f69fffa261904ab2748852f35ce281be54dd4a9718df11056497d79be74377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B6 5748 bytes
font_01_sfnt_off0000a51f.bin
1482ee815f18accc248ccc67b577bda2aec351555f482d8448c690e5fab27a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA51F 10588 bytes
font_02_sfnt_off0000c90a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 4324 bytes

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