Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abb385df70ef408…

MALICIOUS

PDF

44.2 KB Authoring application: Karbon
MD5: 27688d814f60aaa47170e5019a2ba652 SHA-1: 6ead3520b93449c5fe3fe5a28d9e620cee92244c SHA-256: 9abb385df70ef4086552877bde798564d9f75877e13edeaa6b1bd3ead3146e93
130 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which is a common technique for distributing malicious content or conducting phishing attacks. The ClamAV detection further supports the malicious nature of the file, classifying it as Pdf.Phishing.TtraffRobotInstall. The presence of a 'download' lure in the document body reinforces the intent to trick users into clicking malicious links. The embedded URLs are the primary IOCs, likely leading to further stages of infection.

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://michaelyipfilms.net/uploads/1/3/0/6/130639848/2144737.pdf
    • http://valkrieshopgoddess.com/uploads/1/3/0/5/130552034/zejupubewujowugujom.pdf
    • http://havanamoments.com/uploads/1/3/0/5/130538939/6e4ca6b22.pdf
    • http://1600charlestonregionalparkway.com/uploads/1/3/0/5/130544448/tosalebatit.pdf
    • http://mlachomes.com/uploads/1/3/0/6/130639980/90d3b.pdf
    • http://skybluecounseling.com/uploads/1/3/0/4/130475982/goluwe.pdf
    • http://rareronoxe.inity420.com/uploads/2020/01/28/5760893.pdf
    • http://beesbizz.com/uploads/1/3/0/7/130739180/0ef942.pdf
    • http://myearthbistro.com/uploads/1/3/0/7/130739674/6b053cffbbcb3.pdf
    • http://savianflaviusdesigns.com/uploads/1/3/0/3/130379299/diriruvabegu_turamowotuguvo_fawesezonafov.pdf
    • http://chewoncakes.com/uploads/1/3/0/7/130775528/130775528.html#american+english+file+3+students+book+with+online+skills+-+2nd+ed

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013b3.bin
7f12ec259e3079fd3c7e9ec89f0a3a4fe60dbcbab69b1970d2d96f9cd7f05ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3 11408 bytes
font_01_sfnt_off00006442.bin
23df611c204fcacea0cb1a1bd4777a81db0301add4d2a86387d9b428d0dd637c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6442 16648 bytes

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