Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3cf2b9a09c9f08…

MALICIOUS

PDF

50.7 KB Created: 2020-08-10 18:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4628a44c4f446ad30d35b4df2d398dcf SHA-1: 42e1521594a1f1b69de47af9b452d02aa3a406c9 SHA-256: 3e3cf2b9a09c9f08133b28642f8b5235ac1d83c0cd742bb01af081c935878dd1
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=business+success+definition+pdf, which is flagged as malicious. The presence of numerous links to PDFs hosted on Shopify, combined with the malicious redirector, suggests a campaign to drive traffic to malicious sites under the guise of providing business-related documents.

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=business+success+definition+pdf
    • http://files.samuelclemens1856.com/uploads/1/3/0/9/130969636/palegejufav_tuginuzesug_rusesoxojuja.pdf
    • http://files.vanvolleyleague.ca/uploads/1/3/0/8/130874642/zavixav.pdf
    • http://files.innerpathtoascension.com/uploads/1/3/2/7/132712315/kagusudipuzumaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/88270306054.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/52878850462.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/57430242197.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/81093640550.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/zovopinomenutusidibixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/78269486339.pdf
    • https://cdn.shopify.com/s/files/1/0435/2334/2495/files/tedikoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/53661737119.pdf
    • https://cdn.shopify.com/s/files/1/0448/3442/2941/files/91916032122.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/bjt_transistor_theory.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_off00008765.bin
0fe16b2cb84fa729ace1b82a92fc1b16756cb61a2975dbf221073f896b4c1ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 4860 bytes
font_01_sfnt_off00009800.bin
b845b1c8133d8c962ef64e370fa3105c5be858d32f32328f019d16c3cf8048b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 11404 bytes

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