Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee4ba690185a1cd…

MALICIOUS

PDF

42.1 KB Created: 2020-08-09 05:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af9aec9ff6d78da52b89bc61284d43a3 SHA-1: ef9095cb5dc9d38d4ccbb0845774f981aebfc711 SHA-256: 2ee4ba690185a1cd699f021210284928c7f462b5bedca933ef2e494345e25dae
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Formulaire cerfa 13750 5 pdf' and the malicious URL, suggesting a lure. The PDF also exhibits a link farm behavior, embedding numerous external links, many hosted on Shopify, which is a common tactic for SEO poisoning and distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=formulaire+cerfa+13750+5+pdf
    • http://netetik.lighthouse-baptist.org/uploads/1/3/1/0/131071164/jujodakivafexu.pdf
    • http://gevaze.nestdesignsinc.com/uploads/1/3/2/7/132740892/tesakotum.pdf
    • http://files.srpublishers.org/uploads/1/3/1/1/131164542/lugomizukomifogoxiba.pdf
    • http://files.sprinklinnd.com/uploads/1/3/0/7/130776403/1680573.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/fetima.pdf
    • https://cdn.shopify.com/s/files/1/0432/8970/6664/files/14299653033.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/70142212424.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/46117408470.pdf
    • https://cdn.shopify.com/s/files/1/0447/5686/1077/files/to_selena_with_love_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/capitalisme_d_etat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/functional_requirements_and_non_functional_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/53387940166.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/basic_accounting_rules_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/67566436411.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9374/files/42279932447.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/sedodulakojokat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/kuniwegezape.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_off0000623f.bin
6df69ffdc56606497e11ff7c7e411e8451d5fc41ae23073e70cf85d06e1a9f7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 5640 bytes
font_01_sfnt_off00007569.bin
e1ae69601ade7fea754ed1d27dadf947cf98291e7a3d5693801b0c33849cf84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 11628 bytes