Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f86c70b1b509b1…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 06:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79439b7c87ab906933d1525f69fa300e SHA-1: 09cee47e9dcb06a26b6e947e30b631a6ddf34fdf SHA-256: 31f86c70b1b509b15b61b9cd1ed6121eacf61feb6bd5b81afb692e1717e27c4c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, masquerading as a syllabus, with the primary link pointing to a known malicious redirector. This indicates a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly suggest this malicious intent. No scripts were extracted from this sample.

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.cc/pify?keyword=environment+and+ecology+syllabus+for+upsc+pdf
    • http://mepavogu.iamlovedministry.com/uploads/1/3/0/8/130814297/pefefo.pdf
    • http://files.greatalaskanshirtco.com/uploads/1/3/0/9/130969408/317685.pdf
    • http://files.heartlandwestfargo.com/uploads/1/3/1/4/131410167/ragosuvali.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/application_for_job_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/20511944209.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/tiwun.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8901/files/paxumoxezuxerilegikuvav.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/zowovoxorokajisafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/6554091118.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/bafupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/rodupowaxinaxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/27557228908.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3221/files/32970973982.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_off00005fdb.bin
29cfe74dae025eae625d6a0e6a7d58b5955778e72f9827cc3e19413eae53aa45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDB 5732 bytes
font_01_sfnt_off00007359.bin
a7d51dc19d52e8807464adc2cb16b226f474771669422b9eca02b05b371059fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 10004 bytes

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