Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cd5b8569c96b12…

MALICIOUS

PDF

35.8 KB Authoring application: SWFTools
MD5: 23e85a4ade5fed9f3b529c646ae424d7 SHA-1: b70c33002ef7a156715f5d359c341cf38d6639cb SHA-256: b7cd5b8569c96b128591ca9f3f8c7ed218592d3559aecd4e539cd00faa1c8df4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body itself contains garbled text and a few URLs, reinforcing the link-farming behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://labtcenter.com/uploads/1/3/0/6/130605228/7388355.pdf
    • http://cmma2017.info/uploads/1/3/0/4/130483200/detelidomebela.pdf
    • http://xunisa.en-help.center/uploads/2020/01/29/1961887.pdf
    • http://creativetrekkie.com/uploads/1/3/0/5/130545098/xumutogojaporanisu.pdf
    • http://metrowalkatlanta.org/uploads/1/3/0/6/130620628/3856640.pdf
    • http://kylaconner.com/uploads/1/3/0/2/130287991/bizakevofu.pdf
    • https://lapowawide.weebly.com/uploads/1/3/0/4/130435710/xagit-tiwipovo-dalizoset-moparixon.pdf
    • http://northpointebaptistministries.com/uploads/1/3/0/6/130620772/subetijifavevod.pdf
    • http://toreyfox.com/uploads/1/3/0/5/130543837/4924564.pdf
    • http://jobewimew.telelistamg.com/uploads/2020/01/28/sajotinixafomum.pdf
    • http://alexandraresmerita.eu/uploads/1/3/0/6/130639215/kazesaruwi-tibifuziritamil-nefufitirur-zavarorabib.pdf
    • http://loxekij.audiostart16.icu/uploads/2020/01/28/tedegobotonu.pdf
    • http://drpatty.net/uploads/1/3/0/3/130379959/130379959.html#aarariraro+raam+ringtone+free

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e1.bin
3d87277e5edfd29dabae2bd3f14eb72ad5aaa2579cab06c3810b3607686aa4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1 7552 bytes
font_01_sfnt_off00004a00.bin
43b332ef3c8faf786246769ad5fd40cbecb1484dab97dbb3257680f652efcc49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A00 6228 bytes

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