Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51d6c9b817d65c4…

MALICIOUS

PDF

37.2 KB Authoring application: Nitro PDF
MD5: 5bf12090a6827a67b4b05ce1dae2074d SHA-1: 7fb849868ca7ab2efcc6825e87c39e0cd42286b3 SHA-256: b51d6c9b817d65c400b06744dc221d081d3f48026a9dcced85cd8174011fb265
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, forming a link farm designed to redirect users to other malicious PDF files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the phishing and redirection intent. The document body, though heavily obfuscated, contains references to downloading files, aligning with the observed link farm behavior.

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 https://nupogadelo.weebly.com/uploads/1/3/0/4/130476317/denumagosomonu.pdf
    • http://cmisafes.com/uploads/1/3/0/4/130488749/maxovabarabobawoxara.pdf
    • http://alaskanwildcaught.com/uploads/1/3/0/2/130273801/lojexupirogekofe.pdf
    • http://mmorrisld.com/uploads/1/3/0/5/130588670/gizagigezeg.pdf
    • http://6foot7dave.com/uploads/1/3/0/5/130590507/4299803.pdf
    • https://lawijotigalaro.weebly.com/uploads/1/3/0/2/130289063/vifixo.pdf
    • http://mochisprite.com/uploads/1/3/0/6/130620957/4852091.pdf
    • http://absolutefloorsllc.com/uploads/1/3/0/2/130289226/5217966.pdf
    • http://wezavoru.copyrightcontact-100000659807.com/uploads/2020/01/27/b1d48.pdf
    • http://nbptwedding.com/uploads/1/3/0/6/130639544/xozidirufafes-faxolapigi.pdf
    • http://r-mustangs.com/uploads/1/3/0/5/130590154/verobukibogimuz-didibukifef-bazowuzogu.pdf
    • http://repozo.bc-sd.online/uploads/2020/01/29/6d4f46f.pdf
    • http://allamericandogexpo.com/uploads/1/3/0/2/130273626/87c5cc04f096607.pdf
    • http://deltathesis.com/uploads/1/3/0/5/130551087/fubis.pdf
    • https://limejulila.weebly.com/uploads/1/3/0/4/130488920/zowofenudabarebi.pdf
    • http://vintagegypsysoul.com/uploads/1/3/0/4/130489776/volipuzedunupu-kuxizalaforagu-pofijaxeve.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/5/130589293/130589293.html#happy+wheels+full+version++free+pc

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014ad.bin
c70888c1e1f30f2b7573936db3407dea4a9857a820f71c5e29aec3b0fa29cd7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD 7956 bytes

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