Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa4d6994c4d1f48…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 07:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f7a09686f0e95105dfbf345bb7415c SHA-1: dc37858ec6da84b6eb3714b7da32070495109941 SHA-256: aaa4d6994c4d1f48e2245d9f173e477e20cce33a24fdd1085aa34d0245de9fcd
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.ru, which is associated with malicious activity. Additionally, the document exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs hosted on Shopify, likely for SEO manipulation to increase visibility and traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=yellow+submarine+ukulele+tab+pdf
    • http://files.yosoysantialva.com/uploads/1/3/0/9/130969306/rofapanajozadipamis.pdf
    • http://wakoleg.laplatabaptistchurch.org/uploads/1/3/0/7/130776791/647339.pdf
    • http://files.qacustomvans.com/uploads/1/3/0/7/130740211/5122821.pdf
    • http://files.thevictoriafreehouse.com/uploads/1/3/1/4/131407459/kanetuberadode.pdf
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/kuxazokezerirafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5110/5947/files/xiserimepavodanijutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/jamegebozoxol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/44094796253.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9494/files/realm_of_the_elderlings.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/cells_and_their_organelles.pdf
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/ruburolirazanevowa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/zelazuradezasesonizimak.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/79030401421.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/nat_geo_magazine_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/wofezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/2055842983.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/85065294415.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_off0000613f.bin
87f06070a460c811b9fc8fde8283c79acff1d176a7e896a1b154282c8f3c4d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613F 5444 bytes
font_01_sfnt_off000073b8.bin
0a954821b8c5b2515d0f9950aa3040bc222fc79279669175c95765f377d2f881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 14632 bytes

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