Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f64678848ffa9a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 21:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b2622aa45a2c3006671fa343fb970ae SHA-1: 9876849755e9b7a306c3459aa8a47d40822c019f SHA-256: 94f64678848ffa9ae6be1b441b7e53ea52af083f751ff11531734a354f33918a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a car manual. This indicates a phishing or scam attempt. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of the payload delivery mechanism.

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=audi+a4+quattro+2004+manual
    • http://files.sarahinscience.com/uploads/1/3/2/7/132740270/sasuwi_ximumapef.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8821/files/37409495203.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6460/files/23823559563.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/51032847953.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/fisica_cbc_uba.pdf
    • https://cdn.shopify.com/s/files/1/0439/9444/8030/files/12999022523.pdf
    • https://cdn.shopify.com/s/files/1/0429/1841/2451/files/improved_automatic_ironsight_animations.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3674/files/97276976000.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/kodetof.pdf
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/82453334857.pdf
    • https://cdn.shopify.com/s/files/1/0432/4265/1816/files/xutetikarunoxolopelopajas.pdf
    • https://cdn.shopify.com/s/files/1/0439/1242/9723/files/42340735700.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a1.bin
6f1ba84b8a94fc50cbb0dc15cff958a45ccbc5b1a6ed0649f9348a626f3d58c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 5268 bytes
font_01_sfnt_off00007571.bin
ef660721789d3e1529adc443957628bcadad5a71c3041f2df93bbd14da8a62fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7571 10084 bytes

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