Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcdc9560ee2bf14…

MALICIOUS

PDF

31.3 KB Authoring application: PDF Studio
MD5: c5b09fa4238487584d247fe6ffcce15b SHA-1: 82d1edeb8de762968135f77f441fb475ddbbe34e SHA-256: 6dcdc9560ee2bf1443be4c8bcc2e62df87508a513890b8b6dcbf34e5b2f28b14
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics, including a critical rule for a large number of external PDF links, indicating a link farm. The ML classifier and ClamAV also identified it as malicious. The embedded URLs, such as http://voyager-balloons.com/uploads/1/3/0/4/130435702/a44b3e.pdf, are likely part of this link farm, designed to redirect users to malicious content. No scripts were extracted, but the sheer volume of links suggests a phishing or malware distribution attempt.

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://voyager-balloons.com/uploads/1/3/0/4/130435702/a44b3e.pdf
    • http://centerstagehomedesign.net/uploads/1/3/0/6/130620704/libir.pdf
    • http://www.pendlejewellery.com/uploads/1/3/0/5/130550741/doligugume.pdf
    • http://webmail.hamilkerrchallenge.com/uploads/1/3/0/3/130324390/8c07f6f7db4b.pdf
    • http://lifeschooleugene.org/uploads/1/3/0/6/130639251/04d7b91f5a.pdf
    • http://andre-aussiedoodles.com/uploads/1/3/0/4/130476271/kizumefeza.pdf
    • http://teawithmarriagevows.net/uploads/1/3/0/2/130270855/pijepurelejo.pdf
    • http://www.ruenraksa.com/uploads/1/3/0/4/130476248/9004651.pdf
    • http://sektor44.com/uploads/1/3/0/4/130475921/2088721.pdf
    • http://natural-wanders.com/uploads/1/3/0/7/130776850/vetukefovuxog.pdf
    • http://bigresults.co.tz/uploads/1/3/0/6/130621156/sofugirovasa.pdf
    • http://expressoservice.net/uploads/1/3/0/7/130739415/9506553.pdf
    • http://odonovanfamiy.com/uploads/1/3/0/8/130813923/6108262.pdf
    • http://linkp2b.com/uploads/1/3/0/2/130287808/18d035a.pdf
    • http://limitlesslawnsprinklers.com/uploads/1/3/0/7/130776539/jegakalawar.pdf
    • http://rhinesville.com/uploads/1/3/0/2/130289732/pivusoxaforaxufiluto.pdf
    • http://aguiarassessoria.com/uploads/1/3/0/7/130775169/xagufazib.pdf
    • http://mail.kascomarine.ca/uploads/1/3/0/4/130489144/9cd9e7684b.pdf
    • http://nkq5a.slpny.com/uploads/1/3/0/8/130873715/130873715.html#html5+drag+drop+file+upload

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001d1a.bin
a292210dfdfcd90fbf5728e26fd4189a3f0339d75eb7e84da1ae1f0b0654e06d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1A 7660 bytes

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