Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c3a279f5ca43fd…

MALICIOUS

PDF

55.1 KB Authoring application: LibreOffice
MD5: 4d7caefa86bbfd07aab20e0f2103c101 SHA-1: d1104336fad9cd23850f0f75182f84da698974dc SHA-256: a3c3a279f5ca43fd2b805cd362bf84d67110498030b60db439a9c6a6071c6715
120 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded external links, indicating a link farm designed to redirect users. The primary heuristic firing, PDF_SEO_LINK_FARM, confirms the presence of 31 such links, with the first identified URL being http://sleeptember.com/uploads/1/3/0/8/130874529/02cd56ebc046.pdf. This suggests the document's purpose is to lure users to potentially malicious sites.

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://sleeptember.com/uploads/1/3/0/8/130874529/02cd56ebc046.pdf
    • http://voicesinthebasement.com/uploads/1/3/0/7/130739011/pukuxigefu.pdf
    • http://missfitonline.com/uploads/1/3/0/2/130287953/voxidufi.pdf
    • http://doodlepadart.com/uploads/1/3/0/3/130379674/9b70c8a65.pdf
    • http://drmargointhehouse.net/uploads/1/3/0/6/130621366/murim_fetokuvan_juvepojavukodu_zupawuse.pdf
    • http://www.peaktherapy.info/uploads/1/3/0/4/130435716/5677076.pdf
    • http://celebrateagriculture.ca/uploads/1/3/0/8/130813317/1eb55d063.pdf
    • http://supertoadrecord.com/uploads/1/3/0/5/130543671/wofopawebe.pdf
    • http://paintingwithfriendsbw.com/uploads/1/3/0/5/130551981/6af96d.pdf
    • http://buyplayadelcarmen.com/uploads/1/3/0/3/130313333/pakiwenoba-dowiregutu.pdf
    • http://peccatumgule.com/uploads/1/3/0/2/130289344/gidon-nibawa-dorekez.pdf
    • http://masafety.co.uk/uploads/1/3/0/7/130775027/dizukujujubake.pdf
    • http://hotorgrot.net/uploads/1/3/0/2/130271126/roborapa.pdf
    • http://lordpulex.com/uploads/1/3/0/8/130873869/2920345.pdf
    • http://www.greylockband.com/uploads/1/3/0/6/130605492/bbecd9d777e9aa.pdf
    • http://www.ivyclover.com/uploads/1/3/0/7/130775443/nufodotawinababa.pdf
    • http://gelinkalbigelinlik.com/uploads/1/3/0/5/130588540/3126afbcd3f4383.pdf
    • http://www.doubledipt.com/uploads/1/3/0/2/130289441/xovugimarebi.pdf
    • http://digitalcityproductions.com/uploads/1/3/0/8/130813732/xalitazetunuji-woxafuk-mitipig-kopuxojuvov.pdf
    • http://createlikegod.com/uploads/1/3/0/5/130589122/pidamitovikirunupu.pdf
    • http://raverflavor.net/uploads/1/3/0/7/130775672/2ed04465f9.pdf
    • http://new.mgh-r.ch/uploads/1/3/0/6/130603740/130603740.html#famous+apache+warrior+names

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da6.bin
591e55f8d615723d9d744dd8b79f53b102a59a5032691573cf59dd7a09dc4be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 16400 bytes
font_01_sfnt_off000076d7.bin
19a281c3b519c12b4116f5bb854051b8c6d7cf4b87c60ddeb70c558b08d49a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 8780 bytes

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