Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c62324b6720cd1…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 15:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a576041cd448947cb6dc2cd1bf52e802 SHA-1: 363efe9207c6ff195c2fce0772b5ec8bb2da33b7 SHA-256: a3c62324b6720cd10c8971c79c1534b0a18f707f8abf0e50733130b70badf833
150 Risk Score

Malware Insights

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

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. This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure. The primary malicious URL is https://ttraff.ru/wb?keyword=ooty%20road%20map%20pdf, which is likely intended to deliver a secondary payload or lead to a phishing page.

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/wb?keyword=ooty%20road%20map%20pdf
    • http://files.balerno-communitycouncil.org.uk/uploads/1/3/2/7/132712163/sezovom.pdf
    • http://files.karrathacaravanpark.com.au/uploads/1/3/1/4/131437949/9115762.pdf
    • http://files.martychristian.com/uploads/1/3/1/4/131407704/265b26dc617.pdf
    • http://files.donanddarrell.com/uploads/1/3/2/6/132681749/finapeman.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/96732130872.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/39030418877.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/lg_k20v_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/87816046028.pdf
    • https://cdn.shopify.com/s/files/1/0437/2755/2661/files/15818687423.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/nodinifazomifabisapuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/95089431163.pdf
    • https://cdn.shopify.com/s/files/1/0434/8700/2790/files/zasif.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/tuvogilozoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/how_to_change_facebook_notification_sound.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/38304462590.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/jumudotolepomanixalejoji.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_off000063ba.bin
607bff6c783db8ccb3e4c7c1b4f968ba376962a4fd988aec5649158a1bdc3960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 5104 bytes
font_01_sfnt_off00007507.bin
fb915d1a47dcc25d9a8a2b13041475689e63dd7015b6ac8f225f1ec5dba5ba7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 9980 bytes

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