Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf65da12042d2a79…

MALICIOUS

PDF

46.5 KB Created: 2020-07-27 10:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9724a11978f09a12ed94c0c95d544569 SHA-1: a93fed840aeaed7d261e4bc1c92f48e1168c8bd1 SHA-256: cf65da12042d2a79d2417a74cec10a24e146862f77fdd48bb229672f08832e97
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.ru). This suggests a phishing or redirection attack, likely aiming to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=english+vocabulary+about+food+pdf
    • http://files.jessicaruthallen.com/uploads/1/3/1/4/131454899/turujen.pdf
    • http://files.rallytrinidad.net/uploads/1/3/1/4/131407698/besaninajaponefoz.pdf
    • http://files.skicruisers.org/uploads/1/3/0/8/130874683/52f3f86e2d9.pdf
    • http://files.kinnistudios.com/uploads/1/3/1/3/131381555/xunor-sinanepap-zekofineteg-xumubawikewos.pdf
    • http://files.jessicaruthallen.com/uploads/1/3/1/4/1314
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/milufuguviritimurejoverot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/vidar.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/forisoketekiribenudexabar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/xovano.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/55061941071.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/kukobitadepapus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/zerotogibuvibatijekujima.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/9671518489.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/92528707093.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/zomemekuropisa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/19714534207.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_off0000784b.bin
b52113c1c534a5f99a041050318bc51cea67995616c48e662e80b5b03f7c07b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 5440 bytes
font_01_sfnt_off00008abe.bin
d4d3356c4f248e0e5c132bd0fd42379d4482d051992ce5cffec5fbcb85b12e7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABE 10040 bytes

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