Malicious PDF — malware analysis report

Static analysis result for SHA-256 b732b40d37bc2109…

MALICIOUS

PDF

73.4 KB Authoring application: LibreOffice
MD5: f66a3f5d2e82eade4e59d453db134d58 SHA-1: fd7f8e7f022f789ed86fbcb30d069759c5214dde SHA-256: b732b40d37bc21093e42edb52bf357b31b50287cfc7e14a3f45c7fd5ac5776b3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious. The document body, though heavily obfuscated, contains some of these URLs, reinforcing the link-farming attack pattern. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fdnyfootball.com/uploads/1/3/0/6/130604215/e10915997e.pdf
    • http://poko.chat/uploads/1/3/0/7/130740553/1411290.pdf
    • http://multitechroma.com/uploads/1/3/0/2/130270863/631196.pdf
    • http://teamwrightbrothers.com/uploads/1/3/0/6/130620698/jupivixenojoki-togilekip-bijipase.pdf
    • http://tinatan.com/uploads/1/3/0/6/130604045/pukuj.pdf
    • http://propodcastcontrol.com/uploads/1/3/0/5/130543106/wifepesulikini.pdf
    • http://azautogalleryllc.com/uploads/1/3/0/4/130483980/4036196.pdf
    • http://brookesummers.blog/uploads/1/3/0/5/130589216/9cc5ff.pdf
    • http://marinecitydentist.com/uploads/1/3/0/4/130493714/8d4c75a.pdf
    • http://camelcottage.com/uploads/1/3/0/5/130588149/9703299.pdf
    • http://horsepix.nl/uploads/1/3/0/3/130323186/4ae63ca55.pdf
    • http://realityitservices.com/uploads/1/3/0/6/130604575/4638884.pdf
    • http://snackopedia.com/uploads/1/3/0/7/130775023/lixonalofi_rukazokifasi_xipopalug.pdf
    • http://naturomedicbw.com/uploads/1/3/0/8/130874672/6772116.pdf
    • http://drterris.com.au/uploads/1/3/0/6/130621587/2292a.pdf
    • http://warrenbsmith.org/uploads/1/3/0/4/130483300/dobowasof.pdf
    • http://internshipessentials.com/uploads/1/3/0/5/130588613/venoxiwo_zopogumid.pdf
    • http://cetefub.store/uploads/1/3/0/5/130588150/tigonomaduwa_tutod.pdf
    • http://floridarealestatemarketing.com/uploads/1/3/0/6/130604147/zuwireze.pdf
    • http://utahprospects.com/uploads/1/3/0/5/130589080/butoru-siwufudik-gizitomikonurod-fesigogo.pdf
    • http://carrotmeetscookie.com/uploads/1/3/0/4/130435755/2649314.pdf
    • http://chialphapsiucla.org/uploads/1/3/0/7/130739393/3650970.pdf
    • http://preparedmealstogo.com/uploads/1/3/0/6/130621502/pisuvogevimo.pdf
    • http://mrswoodworth.com/uploads/1/3/0/2/130270811/tibanazilaren.pdf
    • http://host243.carmichaelnl.com/uploads/1/3/0/6/130621934/130621934.html#learn+japanese+language+for+beginners+in+hindi

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000132c.bin
b13782bfe9909c62558f87df491e34ca73f4a0003933352a143133a70bc57435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C 8548 bytes
font_01_sfnt_off0000a27a.bin
0d933eb206656276dcb687ca5e8d0531deec9d9f08302a54ae380aa71529c0b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27A 9164 bytes
font_02_sfnt_off0000ba2c.bin
235ceee46122633828457505113dcd2e132e3905da085ebdc673f1f110d006bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2C 4728 bytes
font_03_sfnt_off0000c958.bin
c035513c62a74d7f7c056b05df63aa414494a4874db1988ba69dff912469cc69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC958 17556 bytes

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