Malicious PDF — malware analysis report

Static analysis result for SHA-256 9486a9f96dcbb1e9…

MALICIOUS

PDF

45.6 KB Created: 2020-08-23 17:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99eb22c53009069ffd524341b8b99740 SHA-1: 0c31a0d95c16235b1d96fb59db6765d4d9c5b743 SHA-256: 9486a9f96dcbb1e95b082c6af4ac9d8e1195c121318ff646c4fc0fa8eb58f2e0
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links, including those hosted on Shopify and other domains, suggests a link farm or a distribution mechanism for malicious content. No scripts were extracted, but the PDF structure itself is indicative of a malicious redirection attempt.

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/pify?keyword=error+reporting+php+none
    • http://mabawusiz.sydmocreativeco.com/uploads/1/3/1/6/131606457/nonuminusasoxo_wepoxasagavu_wimolu.pdf
    • http://gudeka.studiobrilliante.com/uploads/1/3/1/3/131398140/199d557f50f51.pdf
    • http://files.husonprojects.com/uploads/1/3/1/3/131378780/3273567.pdf
    • https://cdn.shopify.com/s/files/1/0451/8277/9541/files/garotozefobutafaxelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/christmas_video_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/kidimexog.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/medicinal_plants_in_vietnam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/mule_deer_boone_and_crockett_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0447/1436/0985/files/articulos_de_tanatologia_forense.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/muluruzefigupefix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/65632493392.pdf
    • https://cdn.shopify.com/s/files/1/0446/6517/6217/files/sodigewemarazeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/92240435924.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_off000076be.bin
c5199f4fd0d4ee5bc6a56a7610a1bb2d34bd93e3fdf0818f113c88bef9b58d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 4620 bytes
font_01_sfnt_off00008672.bin
f75936a16c50ce54322c20f0fb863af8c22f8b9218340d36222370c9773dccc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8672 10348 bytes

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