Malicious PDF — malware analysis report

Static analysis result for SHA-256 862effe700d06baf…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 04:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d6a5ef1582796858a8e439778bc69d1 SHA-1: cd471ad2879075bbfe45c8e55a63d8696039f036 SHA-256: 862effe700d06baf52b93b0384d160146389ffe8563f1a4af8d5807412a2acdd
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, including a primary link to 'ttraff.ru', which is identified as a malicious redirector. The presence of a large number of embedded links suggests an attempt to leverage SEO poisoning or distribute malicious content through a link farm.

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.ru/pify?keyword=lagu+katy+perry+birthday+remix
    • http://tonix.mendoviewwindowcleaning.com/uploads/1/3/2/6/132695969/17be6dd2.pdf
    • http://files.stbrigidsschool.net/uploads/1/3/1/8/131872087/fufosum-muvepuvid-pobadesitemij.pdf
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/88310682282.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/vumabomar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/automotive_technology_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/essential_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/35112564349.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6226/files/canoe_software.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/bucharest_street_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/5598/9404/files/90701592803.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/tegifake.pdf
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/jixejugoraveposaxabum.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/nicaragua_vs_us_case.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/iceomatic_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/9029428954.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_off000063dd.bin
11eb5ca75946a5eab3637e87c03e66a8cb448f674ba437fc0ae71c80b71f935d
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 5476 bytes
font_01_sfnt_off0000765f.bin
9366dff57f5b2f34a4534afb410a7f863b21de85670fc992a8211a28c0c640f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x765F 9924 bytes