Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0d830c08a6211e…

MALICIOUS

PDF

50.8 KB Created: 2020-08-28 09:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026f508846d89656f9640f821fe85f63 SHA-1: 368d1c943bf3ad3a487dcb4b8432972f86b08b76 SHA-256: be0d830c08a6211e251d1b8a43fe9efdcb5fe96bf03824b294ad7caa42cdb64f
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is further disguised by a keyword search parameter. The document body, though partially corrupted, contains text related to 'database systems design' and the 'wkhtmltopdf' tool, suggesting a lure to download a specific PDF. The presence of multiple Shopify-hosted links, while some are benign, contributes to the link farm characteristic.

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=database+systems+design+implementation+and+management+9th+edition+pdf+download
    • http://files.mrusselldesign.com/uploads/1/3/1/4/131407705/048fbef28c7825.pdf
    • http://kawixobi.rbstudentservices.com/uploads/1/3/1/3/131398140/gigedamoxijudoga.pdf
    • http://mixawef.faithsnotsoaveragelife.com/uploads/1/3/2/8/132814097/razux_sigemanora_gugidafewun_zisuxapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/pakovikuxasuxiduru.pdf
    • https://cdn.shopify.com/s/files/1/0432/3996/4834/files/68274066438.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/bibupimuloxuzatap.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/xivogewop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/gurazilemozupujevidasol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2323/files/71081350058.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/bangla_boi_link.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/calibri_light_font_free_ttf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/antibiotic_resistance_of_staphylococcus_aureus.pdf
    • https://cdn.shopify.com/s/files/1/0439/1862/2875/files/fiponorajusegarituwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5058/files/48007151983.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7619/files/xubafum.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/pafofodumurajusazabit.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/between_you_and_me_novel.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_off00007dc1.bin
8f33cf04f7dd5ffcc28719b8c157b55e41ad0c0af2da57c76533b4be8931c581
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC1 5848 bytes
font_01_sfnt_off00009190.bin
82ad92846aa192e4f9269746fe44a6cc3a3bb6f6cb7c054c8e72557c88404350
pdf-font-stream PDF embedded font (sfnt) at offset 0x9190 14004 bytes