Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b011ddc769f36c…

MALICIOUS

PDF

84.9 KB Created: 2020-07-28 19:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5e5b565668d5921b5e61e4de9e716cb SHA-1: 00fb9c112c17199bad7776db7ef2bc6609fd23c0 SHA-256: 79b011ddc769f36caeee955e977644febe5f95b5643c2feb080ecad87141bfa6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to Google Sheets column width, likely intended to trick users into clicking the malicious links. 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.ru/pify?keyword=set+column+width+google+sheets
    • http://files.pawsrehab.net/uploads/1/3/1/4/131438629/nimogala.pdf
    • http://files.kokmatoys.com/uploads/1/3/0/7/130775518/wadafajigowakasedos.pdf
    • http://files.youcannotunsee.com/uploads/1/3/1/6/131607805/tubugelawakolow.pdf
    • http://files.valleyriverdancers.org/uploads/1/3/1/4/131437370/leretumasarenotaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/radeduxilagewapenepuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7350/files/32930296958.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/lafokumapovudef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8392/2585/files/67158451054.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/61113923531.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/29079923697.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/26217157337.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/zamatiziridijamo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/tofibaxebododaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/33307996350.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2243/files/84340107614.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/76124854200.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/20064912546.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/wolalom.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/tekavijetefepoxizaka.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_off00010b98.bin
429f7928155baaa26733dda861f371e394a11bde8ccc9007f6e4c433d83fa368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 5124 bytes
font_01_sfnt_off00011ce5.bin
93c2bcd1781cdb4bdf6782e38a2232faa69dd107bee386270a93eafe0ea0082b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 12480 bytes

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