Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecb319ea695addc…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 15:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a246b3ad01dd74caf3e371ef3292f341 SHA-1: d15c8f4cfde85a39bb36212d8bb23a182ffeed6f SHA-256: 9ecb319ea695addc322586fd95c85609212c33932bd74de4183c3eb2cf23901b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a seemingly innocuous keyword related to English grammar. This indicates a phishing or scam attempt to direct users to malicious content. The PDF also hosts a large number of other PDF links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to increase visibility or distribute malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=types+of+noun+in+english+grammar+pdf
    • http://files.landtoseasurvival.co.uk/uploads/1/3/1/1/131163872/1234414.pdf
    • http://mewis.t9corp.com/uploads/1/3/0/7/130775565/0c459.pdf
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/robotic_arm_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/winamoparubikavin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/53701660272.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/semam.pdf
    • http://kerinijon.lane.people.ua.edu/uploads/1/3/0/7/130740434/dolelofitozepuxor.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/barras_bravas_historia.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/13377806849.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/git_flow_init.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/61813037897.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/42758301904.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/kimupavoxisujutudukix.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_off00005e02.bin
b03db07ad96c65317c87bab82c26f0f0eeb6d78db098ecf642a003fdd74c5c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 5504 bytes
font_01_sfnt_off00007097.bin
f75350dfcaeefb5ee874b70e1bd0569581e6b48551deb913454176d1272b9da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 9980 bytes

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