Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da3bb663cc840fe…

MALICIOUS

PDF

36.5 KB Authoring application: Nitro PDF
MD5: 6ae98a72a5a3ed5e47b45af51d04c81c SHA-1: 563671327163f35286e8a63dd78f51c4ae38871b SHA-256: 8da3bb663cc840fe8ca5437b2cbe9eb4549912a3f80db7570f65556eadf6dfff
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a malicious intent. The document body, though heavily corrupted, contains references to Adobe Reader and includes several of the embedded URLs, suggesting a lure to download or view malicious content. The primary attack pattern involves directing users to external malicious PDFs via a link farm.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nickclayton.sexy/uploads/1/3/0/6/130604984/3b65258.pdf
    • http://dogodogo.ru/uploads/1/3/0/4/130476085/mikazebakobad.pdf
    • http://bethany-music-ministry.com/uploads/1/3/0/6/130621102/3366670.pdf
    • http://ilocalsmart.com/uploads/1/3/0/7/130776812/luwizeweto.pdf
    • http://nclexpnprepguide.com/uploads/1/3/0/7/130740112/fowoweko.pdf
    • http://blufftonchurch.org/uploads/1/3/0/4/130436085/7c4ea89368.pdf
    • http://ms-holly-hagman.com/uploads/1/3/0/4/130483728/pulodavuwow.pdf
    • http://k2zmedia.com/uploads/1/3/0/8/130814100/b440bf196.pdf
    • http://grammarassn.org/uploads/1/3/0/5/130588499/2944349.pdf
    • http://yogavadhuta.com/uploads/1/3/0/6/130621089/zomoketevuj.pdf
    • http://thelunakit.com/uploads/1/3/0/5/130544134/wubifobetemuxa_zegesagofulem.pdf
    • http://www.macsmathclass.com/uploads/1/3/0/6/130620976/gaxuzakusenu_nunejago.pdf
    • http://northwesthennepinfamilyservicecollaborative.com/uploads/1/3/0/4/130436451/8659805.pdf
    • http://realmrketo.com/uploads/1/3/0/6/130621683/dad2a76.pdf
    • http://cookiecrumbleslimes.com/uploads/1/3/0/7/130739852/1106709.pdf
    • http://five9demos.com/uploads/1/3/0/4/130475997/setutiro.pdf
    • http://teslawirelessenergy.com/uploads/1/3/0/6/130604273/cd83eabbc.pdf
    • http://officialbrookekelly.com/uploads/1/3/0/2/130270776/rebizug.pdf
    • http://283bemis.com/uploads/1/3/0/4/130483110/8525849.pdf
    • http://www.videomediamarketing.com.au/uploads/1/3/0/2/130288488/371cfc84c63f.pdf
    • http://adamhilto900eportfolio.com/uploads/1/3/0/7/130738762/dinenixit.pdf
    • http://barendvlasman.nl/uploads/1/3/0/7/130738903/130738903.html#adobe+reader+dc+offline+install+for+windows+xp

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec6.bin
357f0109fdd1f9e2364d3b108ae7934764570a2535dccda34136304bfe5f73eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC6 7732 bytes

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