Malicious PDF — malware analysis report

Static analysis result for SHA-256 4991fb64805bac0c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-06 13:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd118736b8a70be476c7935b9526207 SHA-1: 61f07f35f88f73f6ff5fdc2c0832ca16caf0e90e SHA-256: 4991fb64805bac0cee393debf36f93f6d719fea942febfdeedece9acd058d582
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous links, including one pointing to 'ttraff.ru', strongly suggests a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=peltier+effect+refrigeration+pdf
    • http://files.chaddertonheritage.co.uk/uploads/1/3/1/4/131437724/riwujodinarig.pdf
    • http://files.aaronmossmedia.com/uploads/1/3/1/4/131454560/bipowikokizekon-womatuputu-dupubufin-bejivan.pdf
    • http://files.nextlearning.de/uploads/1/3/0/8/130873921/3355187.pdf
    • http://files.northernmarineinc.com/uploads/1/3/1/4/131437987/nuregeg.pdf
    • http://tenijuf.recoveryusingthebible.com/uploads/1/3/0/8/130874359/5038054.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/negezudunosavelisolux.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/58647979695.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/39308705734.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/40622803752.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/16888809515.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/94234137032.pdf
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/divafoxulafobawaximaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/twitch_founders_badge.pdf
    • https://cdn.shopify.com/s/files/1/0438/1877/8781/files/kizabomugukowajapimedomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/zaxigu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/kerazadepebezumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/nurizititevefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3282/files/52203926490.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_off0000724e.bin
ff8e064f005760f9a5ef4bda9fac92daa7500f7e2c0fbecdb80a05ba6905324a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 5148 bytes
font_01_sfnt_off000083e5.bin
7334be20a495cede066fb1462e384419d3143d160faf5e9fa9f6c113e0659165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 10296 bytes

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