Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64d196ecde3ceca…

MALICIOUS

PDF

45.7 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: 83ddf40495161a4f5964cc5c58659f5c SHA-1: 912e463dab2049dfeccfe06879a34cf7420eb7e7 SHA-256: a64d196ecde3ceca8056e2dffb9eb895145153f864887f51760747a6b0979834
152 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 significant number of embedded external links, forming a link farm. The document body contains text related to 'Left behind books free download' and includes several of these external URLs, suggesting a lure to download or access content hosted on these domains. The primary attack pattern appears to be SEO manipulation or phishing through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://rmchcsbd.org/uploads/1/3/0/5/130551704/49e1b.pdf In PDF document text
    • http://naturalqueenstudios.com/uploads/1/3/0/3/130323581/91bfece3d397.pdfIn PDF document text
    • http://ddeusa.com/uploads/1/3/0/3/130313504/8564086.pdfIn PDF document text
    • http://doubleeroofing.org/uploads/1/3/0/6/130621208/3983453.pdfIn PDF document text
    • http://publicrelationsuae.com/uploads/1/3/0/3/130379272/500f32681.pdfIn PDF document text
    • http://youngprofessionalsofsanfrancisco.com/uploads/1/3/0/6/130620172/topigeloroxovon.pdfIn PDF document text
    • http://utahdivorceconsulting.com/uploads/1/3/0/3/130323936/130323936.html#left+behind+books+free+downloadIn PDF document text
    • http://linux.thai.net/projects/fonts-tlwgIn PDF document text
    • http://www.thaitux.infoIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270 8144 bytes
SHA-256: 0dc575b4983698abe247ef7ad7e15db8cc51bbb4c1ff7d7b63d6607da1ae5ee5
font_01_sfnt_off00006961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6961 10764 bytes
SHA-256: 9dbefd29ad56edc3ec27c88540d7d41398a664ae3f1544cdca53ccca226c91b2

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