Malicious PDF — malware analysis report

Static analysis result for SHA-256 91558bfc59b5a7c3…

MALICIOUS

PDF

59.6 KB Authoring application: GIMP
MD5: 775382bfde913ef6ca7a8340f16c9b01 SHA-1: 2d6dbdb4c6b3710d256aeb2389d91dee22b43b70 SHA-256: 91558bfc59b5a7c37be767f2fa1125574548c72f33f640c2fd1847190cde4e5c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a phishing or traffic redirection motive. No scripts were extracted from this sample.

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://notoedrag.com/uploads/1/3/0/2/130289244/gewegamokabibovufoto.pdf
    • http://mochex.com/uploads/1/3/0/2/130272247/22bdd4e5102d.pdf
    • http://bbodaciousfitness.com/uploads/1/3/0/6/130639477/kitubisawixezari.pdf
    • http://onehundredrobotslab.com/uploads/1/3/0/4/130435990/b48fb.pdf
    • http://mybarrieroflavish.com/uploads/1/3/0/2/130272094/pomadowosivu.pdf
    • http://andrenathletics.com/uploads/1/3/0/5/130546283/188af39e.pdf
    • http://nationalcasinomarketing.com/uploads/1/3/0/6/130620644/a62c8490dec1.pdf
    • http://bcssummerlanguagecamp.com/uploads/1/3/0/5/130545882/silegitapufagej-romizifutemadur-jikodinewamotib.pdf
    • http://objects-of-grace.com/uploads/1/3/0/2/130291786/kidipebitoji_vulowumaz_nuxuwupevewe_daraxot.pdf
    • http://mountainbikegreenville.com/uploads/1/3/0/6/130604373/dogotemi.pdf
    • http://churchesindeerpark.org/uploads/1/3/0/4/130436365/6159647.pdf
    • http://skybluecounseling.com/uploads/1/3/0/6/130621651/gevipimufogogi_xiwomiji_zenaruwovu_wapigudedem.pdf
    • http://djspizza1.com/uploads/1/3/0/3/130379347/130379347.html#website+video+er+mac

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000097b4.bin
08282010bfe7aadfe170fa9c95ae684442ed4304625e76c2cdeee765bb973633		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x97B4 20628 bytes
font_00_sfnt_off0000118a.bin
1198334ffe842741560a4790e6525b129070ad4915203e8363e11da4061b5795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A 8600 bytes

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