Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9ce39cf11428b8…

MALICIOUS

PDF

53.8 KB Created: 2020-08-23 09:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3c30dea2df3804118b9bb29d06bcbbb SHA-1: 8ba6592ed81e101bf0cb06b7a9265767ed606c76 SHA-256: bd9ce39cf11428b8055d447bdd2c3a0fde5d3bfe91347876bc2c8b01a60b6126
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive link presented as 'Bolus infusion guidelines' that redirects to a known malicious domain (ttraff.com). This indicates a social engineering attack aimed at tricking the user into visiting a harmful site. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content-spinning technique to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this document.

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.com/pify?keyword=bolus+infusion+guidelines
    • http://files.seatyourselfpodcast.com/uploads/1/3/2/6/132683292/revifora.pdf
    • http://files.thescentedsheep.com/uploads/1/3/1/3/131398386/sarotezavakawu.pdf
    • http://files.marshareevesart.com/uploads/1/3/0/7/130775870/laxef-refuv-ketuwosekulesud.pdf
    • http://files.5oclocktravelandcruise.com/uploads/1/3/0/9/130969260/ridinodupunorutufije.pdf
    • http://files.missminnesota.org/uploads/1/3/2/6/132695258/paduluj_jozuwosolimivop.pdf
    • http://files.thescent
    • https://cdn.shopify.com/s/files/1/0435/2367/0176/files/causes_and_effect_of_environmental_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/nagagit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/14228003905.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/53466512905.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/vubopul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/the_allyn_and_bacon_guide_to_peer_tutoring.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/vuzugeletabanewudedoju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008041.bin
890456288b0ceb93145f267721b0a192f459d509e0d803c46814b6539bcc185d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 4816 bytes
font_01_sfnt_off000090be.bin
852f12e182c8d0e82b84a2bea710b6019b9b668e7e0e25ea8bc12efd55c929e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x90BE 10796 bytes
font_02_sfnt_off0000b533.bin
ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833
pdf-font-stream PDF embedded font (sfnt) at offset 0xB533 16060 bytes