Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09ded4335f739ab…

MALICIOUS

PDF

43.8 KB Authoring application: Adobe PDF Library 9.0
MD5: 51ec97bd3a3e615917b85f01e5588078 SHA-1: a08aba742d376f992a3a1d04b6ab9de3c864572d SHA-256: a09ded4335f739abe78b4e69439623dd36fc408e0be3fbf96977f582e9c50374
120 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded external links, characteristic of a link farm used for SEO poisoning or phishing campaigns. The primary URL identified is http://kef.validaingresso.com/uploads/2020/01/28/c3949e1ff.pdf, which is part of a pattern of generated SEO PDF links.

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://kef.validaingresso.com/uploads/2020/01/28/c3949e1ff.pdf
    • http://microcreditosstopig.weebly.com/uploads/1/3/0/6/130639398/suraralanodirita.pdf
    • http://toosrodieck.com/uploads/1/3/0/4/130488935/7833635.pdf
    • http://cbconservation.com/uploads/1/3/0/6/130639481/2831000.pdf
    • http://puppylovepetcarema.com/uploads/1/3/0/4/130435712/vozudeg_tinegena_wifobuwo_jajusapegepe.pdf
    • http://jjhomez.com/uploads/1/3/0/4/130489423/kuzudenemisem.pdf
    • http://metropolitancabinetworks.com/uploads/1/3/0/4/130476262/vifamodoxukefez.pdf
    • http://safebeautymovement.org/uploads/1/3/0/6/130639266/roxufujovujibuz.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/6/130621309/130621309.html#ard+mediathek+video++iphone

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013f6.bin
3addd85608597ffe6edf57b7d5c110153d388e38c76da021bd889da21798e8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6 9816 bytes
font_01_sfnt_off0000636d.bin
7edcda437fd7bc9ab2ba2bbbfc0fc9ce617508aa72b533152b106fbcf74d4219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 16440 bytes

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