Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8976b43e62253b…

MALICIOUS

PDF

39.1 KB Created: 2020-07-31 09:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 006f1c544c7ae3a12591295415af5e37 SHA-1: 1e58c8b800ef07ba5d070f676b9ddc38a40e494d SHA-256: 9a8976b43e62253b537c674f1795bef7b68e4162becb4207319f46d3158eb73a
150 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a significant portion of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The presence of a link farm further supports the malicious intent, aiming to lure users to potentially harmful sites.

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=mas+gente+toxica+pdf+gratis
    • http://files.cupcakecafe.me/uploads/1/3/0/7/130738988/xumixetidibevoxelob.pdf
    • http://files.salembasketballofficials.org/uploads/1/3/0/9/130969408/kugigumafewos.pdf
    • http://files.agenda2001consulting.com/uploads/1/3/2/6/132681448/2577048.pdf
    • http://files.jawsmechanical.com/uploads/1/3/1/8/131871730/1198709.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/42446998751.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/5955573804.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/rebut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/favojezuvogup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/sakubipumepivetero.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/dudizofonozuwukexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/linetunajawadavipenal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/tudokifodenopojuxujivo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/kedawolafulag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/nezaxor.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/39490319704.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/89364655305.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/95600340577.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/dixomulalazaripa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/kovewinikedusu.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_off0000598b.bin
fc1b7ca304098c7627d95998091382d4c46e56d8c5e75033b67da57e1325ff73
pdf-font-stream PDF embedded font (sfnt) at offset 0x598B 5152 bytes
font_01_sfnt_off00006b26.bin
b26fba90da30e701f9747250e82d5553c1f0a735b2469d87777be84a12dd9785
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B26 10616 bytes