Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a73f39095e6755…

MALICIOUS

PDF

41.8 KB Authoring application: Serif PagePlus
MD5: 52db8603c96c56a745bbe483d63fb8d9 SHA-1: fd5f2ba039a08bdae74b3f001b678fd2a4de5081 SHA-256: 55a73f39095e6755191978d91f88f67ce12f7d052e24e613776217cf7f95e797
120 Risk Score

Malware Insights

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

The PDF file was detected as malware by ClamAV, specifically 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. Static analysis revealed a large number of embedded external links, indicating a link farm likely used for SEO manipulation or to distribute further malicious content. The document body, though heavily obfuscated, contains URLs that mirror those found in the heuristics, reinforcing the link farm attack pattern. No scripts were extracted from this sample.

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 https://luwujujub.weebly.com/uploads/1/3/0/4/130488914/7662b9cc07cd232.pdf
    • http://jukobos.coldmineral-soap.com/uploads/2020/01/28/fedosagujusij.pdf
    • http://kil.vipiski-besplatno9.icu/uploads/2020/01/28/8702430.pdf
    • http://fexugijo.factandi.tech/uploads/2020/01/29/febegi.pdf
    • http://mobetar.storeshop.xyz/uploads/2020/01/27/676261.pdf
    • https://vagugawusa.weebly.com/uploads/1/3/0/4/130483736/kovajofulexodafodimu.pdf
    • http://xidowikeme.canlisexhatti.online/uploads/2020/01/29/govarudebolepu.pdf
    • https://ginosakokonizu.weebly.com/uploads/1/3/0/4/130483407/xenerav.pdf
    • http://jixamig.audiostart31.icu/uploads/2020/01/29/lelib.pdf
    • http://hello-baby-toys.com/uploads/1/3/0/4/130476047/130476047.html#best+hip+hop+dance+music

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000136c.bin
b2312c7f99b06c4bb9c5e1379439e4785b468f3e0b9cea951f11c865cb670a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136C 8180 bytes

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