Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53ae080f5b0d4cd…

MALICIOUS

PDF

40.6 KB Authoring application: Pdftk
MD5: 37030d729aac8f7e567196d9aaf750dd SHA-1: 058ba62c806b83a3e50ee16a9f4f278ceb91bb7c SHA-256: a53ae080f5b0d4cd1ec5698c132d6f5aa5708535e7f3bb71652f5fc7834e24e0
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 to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score support the malicious verdict. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://ataconstruction.trustabiz.com/uploads/1/3/0/6/130639983/sanunira.pdf
    • http://nwlaxshack.com/uploads/1/3/0/6/130604488/c4885529ce86a44.pdf
    • http://mcgrainz.com/uploads/1/3/0/6/130604401/da88200893e.pdf
    • http://rudgeramos.net/uploads/1/3/0/4/130489262/rijakerixex.pdf
    • http://michiganelopementcollective.com/uploads/1/3/0/7/130775584/add7d7826.pdf
    • http://thesituationshortfilm.com/uploads/1/3/0/6/130639305/kadadukudaliwix.pdf
    • http://sophieleblancvisualmedia.com/uploads/1/3/0/2/130271171/9589520.pdf
    • http://gkneeblog.com/uploads/1/3/0/6/130640095/5260617.pdf
    • http://medicalmarijuanamiracle.com/uploads/1/3/0/5/130589189/690876.pdf
    • http://zofe.fr/uploads/1/3/0/7/130739934/4a60e3dd0.pdf
    • http://rsvptotony.com/uploads/1/3/0/2/130289793/tamabijabofodopefa.pdf
    • http://drlesterleemd.com/uploads/1/3/0/5/130551619/buwono.pdf
    • http://twynetrip.com/uploads/1/3/0/3/130379581/gujasusakuwabixafow.pdf
    • http://portaleconomico.info/uploads/1/3/0/4/130435670/fupefavex.pdf
    • http://frugalmix.com/uploads/1/3/0/3/130379482/5d9c5cbc4.pdf
    • http://microbearding.com/uploads/1/3/0/4/130488213/1946136.pdf
    • http://thingsome.com/uploads/1/3/0/4/130483514/jatasozosiwodibofeb.pdf
    • http://amslickdeals.com/uploads/1/3/0/6/130639941/mujabotuzarexew.pdf
    • http://mx.trailerparkclass.com/uploads/1/3/0/5/130589416/sijowomeji.pdf
    • http://mx.grandsalinelibrary.com/uploads/1/3/0/6/130639249/130639249.html#define+inductive+and+deductive+method+of+teaching
    • http://ataconstructio

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004003.bin
5a3fcd38cb9821b9d98953df320be1fb6ac1fb129ccc79a82b1602e05ec87fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4003 8144 bytes

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