Malicious PDF — malware analysis report

Static analysis result for SHA-256 9089f327904d2292…

MALICIOUS

PDF

39.7 KB Authoring application: Smallpdf Desktop
MD5: a0bd14798499c5a442e1540b46e06de4 SHA-1: bfa72216225695185bc1b7bfa268b8664aff7db5 SHA-256: 9089f327904d229269d694d527a338b9026dd1abd5f5f75b14c57c671043e621
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier indicated a high probability of maliciousness. The primary heuristic identified a large number of external PDF links, suggesting a link farm or redirection strategy. The document body contains numerous URLs, many of which are also listed as IOCs, indicating a phishing or malicious redirection 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 https://jekopazapujun.weebly.com/uploads/1/3/0/3/130379167/jomakebafo.pdf
    • http://momentsinhavana.com/uploads/1/3/0/6/130639762/rawabokitifitaverero.pdf
    • http://premierdraftroofing.com/uploads/1/3/0/2/130270917/gebiti_xevuli_lenofalu_lelesebexon.pdf
    • https://vimizikirenosim.weebly.com/uploads/1/3/0/3/130379143/5834508.pdf
    • http://napervillespa.net/uploads/1/3/0/3/130379415/fojavomajiji.pdf
    • http://myrabi.com/uploads/1/3/0/7/130775365/julebevuw.pdf
    • http://michaeltaylorwrites.com/uploads/1/3/0/6/130621772/jejum.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/4/130488662/perufijesaneko.pdf
    • http://fournildejean.com/uploads/1/3/0/2/130287929/zonasojuzuzo.pdf
    • http://ndtasanantonio.org/uploads/1/3/0/8/130813111/130813111.html#mean+arterial+pressure+equals+cardiac+output+times

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000124b.bin
aaa19d1a6b3ab46921b6a96133b266116028c52114c61263230465a87d600558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B 8400 bytes
font_01_sfnt_off00005fb2.bin
e2a609504f31aba74360c8f97aead3d8f97c76e888a653261413c8bef59e3205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB2 2884 bytes

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