Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccca01bca51fff6…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 01:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66c3feb9fdca5b909cc9aa405f6a65aa SHA-1: 30c85b8fd6c0e0072d0bb96752ab2d0cdb142cbf SHA-256: cccca01bca51fff69d97bdee0b55b47335f171bc2f07c9c88f2b5a9336dde5d4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at ttraff.ru, which is disguised as educational content. This suggests the document's primary purpose is to lure users to malicious infrastructure through a deceptive link farm.

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=dolch+primer+sight+words+worksheets
    • http://koxaja.nathanwitter.com/uploads/1/3/2/7/132712109/4043126.pdf
    • http://files.oldpueblosoapery.com/uploads/1/3/0/8/130813906/kumewajipimaz.pdf
    • http://files.libbymourant.com/uploads/1/3/1/8/131856173/sadutotogel-febevobi-lobuvebokosav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/sirivixepuluxelufexim.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/verbal_ability_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5869/files/getakonabob.pdf
    • https://cdn.shopify.com/s/files/1/0443/4444/3036/files/82054435706.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/56912716439.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/77535441730.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/10696701241.pdf
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/loxozomumeluj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/neonatal_sepsis_guideline_cmu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5493/files/jimixumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/fleetwood_prowler_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_off00005d7f.bin
2a7b24454dae74463d897864892184aa05c24588caeeb1469472a3eb69993d91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7F 5432 bytes
font_01_sfnt_off00006feb.bin
7a13397d6b925c67de56424b7e0787ba76e0d1008d4790563faf48860484937a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 10076 bytes

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