Malicious PDF — malware analysis report

Static analysis result for SHA-256 85427a2f1dbee4a6…

MALICIOUS

PDF

34.8 KB Created: 2020-08-29 12:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04cc4afbe53a1b2d9e478d681c51a3a8 SHA-1: 9f5c7b7927821492c94b2872625650291ed050d6 SHA-256: 85427a2f1dbee4a63141756ebad36531b3f4376ef3cebb470893398e330e1ef3
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to a link farm hosted on Shopify. One of the embedded links, 'https://ttraff.cc/wix?keyword=othello+lesson+plans+ks3', is identified as a malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a lure for malicious activity.

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.cc/wix?keyword=othello+lesson+plans+ks3
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/junos_enterprise_switching.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/adobe_printer_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/sedomegubomi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/kptcl_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/ipratropium_bromide_albuterol_davis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/bezixizowepufekagop.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/fagabuvamoxab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7133/9686/files/balancement_thoraco-_abdominal.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/extra_utilities_2_cobble_gen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/calendar_2020_november.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/blank_map_of_european_countries.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/tevivog.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/39962425019.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_off00004a9e.bin
540d2fca164a370e152e23bf8ef8dd4a393cc7960c7b50281af6d88fb5a41903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9E 5064 bytes
font_01_sfnt_off00005bce.bin
2bfb3ccc7ab55678f88bac35d56cd701a7452bb3166ad3bc5092662819180c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCE 10172 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.