Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c2487e1c53ecea…

MALICIOUS

PDF

49.6 KB Created: 2020-08-01 04:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06a3632e1931b1b3c354865530e1a03 SHA-1: 7fee2f861a846e8fef64757ae6045597dcd9d608 SHA-256: 92c2487e1c53ecea69644d96bd720288dbf107f1bcd22632adae05e4a43b6089
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier strongly indicates maliciousness. The document body contains the text 'Taks released tests' and the malicious URL, suggesting a lure to external content.

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=taks+released+tests
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • http://files.themadisonchildhoodcancerfoundation.org/uploads/1/3/1/8/131871479/ripofajuba-kegor-walolodotavad.pdf
    • http://files.superiorlogworks.net/uploads/1/3/1/3/131379873/dfc23e54cc8b7d.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/vuripuluvitejaneligupajon.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/dilefagenuvew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/2007_honda_vtx_1300_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/33859494821.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/23779937042.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/76746245084.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/jiwediduwereros.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/81947384070.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/novubaxuledigojodimofaz.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_off00007dbf.bin
805d982ed3557d7521977f5016874d781605da955c2697f17cb199c2e97856c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 4832 bytes
font_01_sfnt_off00008e38.bin
f71755f8e8fc85ad45188bc2a8c84d664a2634b03909473217845d748bccd278
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E38 14136 bytes