Malicious PDF — malware analysis report

Static analysis result for SHA-256 83175edd4b5ef2e9…

MALICIOUS

PDF

62.3 KB Authoring application: Solid Converter PDF
MD5: ab90c4d024284be52f872f33f86b0dc4 SHA-1: f49c8240e7af107ede0561a686482356f03139be SHA-256: 83175edd4b5ef2e9b7a6b1a315ff468b0114f55d45e10cc3b34e9b25e1018d2b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output further support its malicious nature. The embedded URLs are likely part of a phishing or redirection scheme to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://100places-locations.com/uploads/1/3/0/2/130289387/9a91f3e0276631.pdf
    • http://alternativerecoverysolutions.com/uploads/1/3/0/4/130476795/3688301.pdf
    • http://derrettphoto.com/uploads/1/3/0/7/130775398/9186997.pdf
    • http://programsformindfulliving.com/uploads/1/3/0/3/130313111/xavefigopasowaxa.pdf
    • http://directinservicetraining.com/uploads/1/3/0/3/130313166/abc34de358bd.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/4/130476519/130476519.html#calibredrv+manual+pdf

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c3.bin
03da5c59112840b5b435e88e64a7883b56bfc5889e0de8210b0a331cc90a979f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3 9804 bytes
font_01_sfnt_off0000a5fb.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FB 2652 bytes
font_02_sfnt_off0000aecb.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAECB 16036 bytes

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