Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e24e057f237209…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 18:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 412b0f95a03c568333028965a92f24d9 SHA-1: e239b27c6e44b061a69d3a30e95e0958aeb221b1 SHA-256: 80e24e057f23720949a623a4c30c2a21937109417c765498be3a0fa971434341
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=competitive+exam+maths+questions+with+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to competitive exams and the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=competitive+exam+maths+questions+with+answers
    • http://fidigarom.thewildwaycoffee.com/uploads/1/3/1/8/131857252/e265dfeda12e.pdf
    • http://files.urbanrenewaljazz.com/uploads/1/3/2/8/132816202/2228462.pdf
    • http://files.jordanback.net/uploads/1/3/0/7/130739786/munov.pdf
    • http://files.reidmachinery.co.uk/uploads/1/3/1/4/131438490/zikivemoji.pdf
    • http://files.pdxfreeplay.org/uploads/1/3/2/3/132303013/kelin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/tafuwezibubegiga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/81773341212.pdf
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/51702176092.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/bijaxugojipinelis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/juleporobedoman.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/western_australia_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/79918050754.pdf
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/participatory_assessment_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/jijiwiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/wuvapot.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_off00005d44.bin
8e87648b9c2d9addd9ab1ce452e14555bf81feee00018643fad1c2341a630a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5276 bytes
font_01_sfnt_off00006f26.bin
55049117e8a936037167e2ff61fba0c5e6608e1e605af713ffab5e5e59cd8c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 11368 bytes

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