Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59932ff12c669fc…

MALICIOUS

PDF

42.0 KB Created: 2020-08-04 17:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf0cbf718debc0277b58a02e6b45b492 SHA-1: a1a724cf045f34efc75dbecadae8169b00143b6d SHA-256: b59932ff12c669fc7643cd104eb3ad7fde6807bb46aa6edbbce0d331d1fce833
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.cc'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=borneo+map+pdf
    • http://files.shorethingexotics.com/uploads/1/3/2/6/132681352/gopuke.pdf
    • http://files.cliffgloverpottery.com/uploads/1/3/0/7/130775838/tudev.pdf
    • http://files.prairieskycreations.ca/uploads/1/3/2/7/132741389/tiwusitiz.pdf
    • http://files.allgoodsmke.com/uploads/1/3/0/7/130775949/2609218.pdf
    • http://files.nicolettabuildingcontractors.com/uploads/1/3/1/0/131069886/latibatokodipuloma.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/xoxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/9543768226.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67279733654.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/16831475853.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/54302819129.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/famekajofulekosubokuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/80042567419.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/41472353708.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/taradedetudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/geometry_mcdougal_littell.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/wepedatamusekiro.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_off00006746.bin
3fff26ba08d8e44e13a86b2f826c177798253919af7b9388f8d1fc955919c1db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6746 5028 bytes
font_01_sfnt_off0000784d.bin
f4dff6059e50ec23197e3389511a7e1225cf46e660e6456a93c7dbda50c122a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x784D 10088 bytes