Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dd8a1f64bc11e5…

MALICIOUS

PDF

35.7 KB Authoring application: Smallpdf Desktop
MD5: 58b91f166a517d474b2dbd0d5da2a14d SHA-1: 00a4adb066ecb8e821a0102cdc4f301fcb8efd78 SHA-256: 40dd8a1f64bc11e5cccaeac9a18f1f889270af4295e03be90cfd971846ebc39c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary suspicious URL, http://shotz.website/uploads/1/3/0/5/130590588/tovuzubut.pdf, is the most prominent IOC. The ClamAV detection further supports its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall. The document body itself contains obfuscated text and embedded URLs, reinforcing the phishing or malware distribution lure.

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://shotz.website/uploads/1/3/0/5/130590588/tovuzubut.pdf
    • https://nafukamabepikib.weebly.com/uploads/1/3/0/4/130489649/sabud.pdf
    • http://clarazul.com/uploads/1/3/0/6/130639815/1630662.pdf
    • http://rupisugu.shop-siberia.ru/uploads/2020/01/29/zuzituna_tofili_daledixolova.pdf
    • http://clamagorereef.com/uploads/1/3/0/4/130436049/lowaro_pivaz_kunaluvaxibi_kosis.pdf
    • http://theprojectiondesk.com/uploads/1/3/0/5/130590334/763f0.pdf
    • http://constructiondollarsandsense.net/uploads/1/3/0/5/130538946/wejipoze_ropozove.pdf
    • http://cyclebavaria.com/uploads/1/3/0/5/130590380/130590380.html#alter+ego+3+guide+p%C3%A9dagogique+vk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013e9.bin
cabc18bf43676e3687d3d1b6762d8c48c7f6b5085522316bd3c3337999ba2c9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9 14308 bytes

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