Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b6cda39323a68b…

MALICIOUS

PDF

61.1 KB Authoring application: Smallpdf Desktop
MD5: 43e389512f79c13a54c3929d7867a160 SHA-1: 9430b337d4d3ecd8809bd2d488f9eae62e0d7920 SHA-256: 51b6cda39323a68bb820c49d52dc4aed55f270c178a04a18c22288d4e4f01cd6
120 Risk Score

Malware Insights

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

The PDF file exhibits a critical heuristic firing for a link farm, containing numerous external URLs pointing to other PDF documents. This suggests a tactic to manipulate search engine results or distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' reinforces the malicious nature of the file, likely related to phishing or traffic redirection.

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://www.mksplumbingsocal.com/uploads/1/3/0/3/130323900/7561339.pdf
    • http://mnixonsclassroom.com/uploads/1/3/0/3/130379243/1517134.pdf
    • http://affinityforever.com/uploads/1/3/0/2/130287281/9586233.pdf
    • http://dragonflyphotographyceramics.com/uploads/1/3/0/7/130776142/tufirawazemo-nivukuxadega.pdf
    • http://downsmassage.com/uploads/1/3/0/5/130589054/1149216.pdf
    • http://www.joshschoonmaker.com/uploads/1/3/0/2/130289315/6339b2503eca.pdf
    • http://melas.store/uploads/1/3/0/4/130476348/d6e3efc.pdf
    • http://benchmarkgroundtransportation.com/uploads/1/3/0/5/130542912/nalinopilu.pdf
    • http://solarlandscapes.net/uploads/1/3/0/6/130604074/buzusoxitudixux.pdf
    • http://kalamazoodistilling.com/uploads/1/3/0/6/130620778/4610171.pdf
    • http://jonfreeland.net/uploads/1/3/0/5/130543366/dojamojonudowu_vajabubizitozu_bagerav_xepana.pdf
    • http://mrsuttonhistory.com/uploads/1/3/0/5/130588594/sipexamixepu-rivogod.pdf
    • http://sexualgames.org/uploads/1/3/0/6/130639404/5569783.pdf
    • http://swept-supplies.com/uploads/1/3/0/7/130776500/kunaluvirumo_luxisunapapo_fozibisaveka_kilekij.pdf
    • http://tcsis.co.uk/uploads/1/3/0/8/130874154/gudimaz.pdf
    • http://remarkables.club/uploads/1/3/0/6/130621082/7199220.pdf
    • http://aktivmassageterapi.se/uploads/1/3/0/6/130639062/gumeburuzo.pdf
    • http://hotelsthepas.net/uploads/1/3/0/7/130739225/9753218.pdf
    • http://vidcorp.net/uploads/1/3/0/5/130590622/9329390.pdf
    • http://jusdesock.com/uploads/1/3/0/5/130551116/kobali-tezigodukewu-nejusowapo-winafuralaza.pdf
    • http://nwrealtybrokers.com/uploads/1/3/0/7/130739167/zadenizide-sesajirar-xuwagefixof.pdf
    • http://johnhenryfox.com/uploads/1/3/0/6/130640146/zamulura-wisumo.pdf
    • http://conversationsonthegreen.org/uploads/1/3/0/6/130620614/fbccfe2506fb.pdf
    • http://mysteretro.com/uploads/1/3/0/6/130604081/2258228.pdf
    • http://webmail.rodhillportraits.com/uploads/1/3/0/6/130604304/130604304.html#geographically+accurate+tube+map+poster

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000017b8.bin
c825be8a5b2fefadf0189a8d7beca55dae1c391630c22f27a69c1c4ab433acb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B8 8644 bytes

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