Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c328340e721a66d…

MALICIOUS

PDF

48.0 KB Created: 2020-08-02 21:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c10645cdd7e4712729aaed17b7d75058 SHA-1: 717364ea91c265b66d68f47b902a9d681d33958d SHA-256: 8c328340e721a66d70df887b4ceb78622af899bbb84f837848271e3b99ae6d6c
150 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=windows+10+hardening+script'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection via the embedded links.

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=windows+10+hardening+script
    • http://files.bahamasteachercadets.com/uploads/1/3/2/8/132814097/wotawudo.pdf
    • http://files.limegreenconsulting.co.uk/uploads/1/3/0/7/130738512/330897.pdf
    • http://files.lawlerpubliclibrary.com/uploads/1/3/1/1/131163980/mefuwivebaj.pdf
    • http://files.theirmadiaries.com/uploads/1/3/0/7/130738996/vodezagij.pdf
    • http://files.paveshare.org/uploads/1/3/2/6/132682883/rokumi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/21325053063.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/sewora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/67889106277.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/budemilelufutivudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/xapajavakizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/grade_3_shroud_topsoil.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/r_mtg_arena.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/serial_ccleaner_professional_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/63024833633.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/80693647531.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/ponukebikumumazezisot.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/secret_lovers_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/nulojugugoxafid.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_off00007b04.bin
c7ddf4844f727cf3ec61109d97b2a73d3c02cfdce39364aba8532045ecb3a097
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 5600 bytes
font_01_sfnt_off00008e30.bin
855d02b135a6b7180edebb6a590f042eed9c7f867a7792f5a70adcaf5272e7f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E30 10600 bytes