Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7944a3c1d6ebd40…

MALICIOUS

PDF

44.7 KB Created: 2020-08-13 08:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a031ad42e85c702aad2f69310d453dab SHA-1: 92606f85ebebe82d97967161935531c49c8e5511 SHA-256: d7944a3c1d6ebd40f1ca186f64c013a64633f20f2a60b09758f9392933a485ea
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a prominent link to `https://ttraff.com/wb?keyword=short%20film%20scripts%20in%20telugu%20pdf`, which is flagged as a malicious redirector. The document also includes a large number of other links, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic to disguise malicious intent. The ML classifier strongly indicated maliciousness.

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/wb?keyword=short%20film%20scripts%20in%20telugu%20pdf
    • http://ninejupo.clarysageconsulting.com/uploads/1/3/1/4/131454165/zajarulasenugonona.pdf
    • http://files.stilettosinthemud.com/uploads/1/3/1/8/131872021/nukixeto.pdf
    • http://files.foreveryseason.net/uploads/1/3/1/1/131164016/fonoremoj-kolixewe-sotewora-koxiduxebafabap.pdf
    • http://files.lakekitchawan.com/uploads/1/3/0/7/130740118/40855e064ad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/capacitores_en_serie_y_paralelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/gebuludazemoloseb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0306/8068/files/17329704877.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/speaker_knockers_dead.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/harta_apuseni.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/blank_outline_map_of_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/nifiwifikuxufuzot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/sedezosujuzidosudev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/generac_22kw_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/26073107513.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/letters_and_sounds_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/html_button_onclick_download_file.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_off0000703d.bin
07664719146a57e170699810e1c4056531ec03ed9be3354a1f24d137a6635798
pdf-font-stream PDF embedded font (sfnt) at offset 0x703D 5464 bytes
font_01_sfnt_off000082a8.bin
84a4cade73b251efbd95896bac9b14bb7fc5da4f1014015af8d470ff62a7e6d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A8 10304 bytes