Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d42d9b186f1c5…

MALICIOUS

PDF

30.2 KB Authoring application: Nitro PDF
MD5: 20e22dc351e0806c81b3a1835fb72374 SHA-1: bf998a774af013bfcf311ef24ac7f7d04a0cd310 SHA-256: 134d42d9b186f1c5b6da08035fa572ab525396f1e418e29c778db090b771ec62
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as phishing and potentially related to automated traffic generation or malware distribution. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nelsonbaypreschool.com/uploads/1/3/0/5/130542935/5851105.pdf
    • http://abovetumblerridge.ca/uploads/1/3/0/4/130476033/vasogogurufi-zavoxuvinepol-xusinakotodi.pdf
    • http://informed-deforms.com/uploads/1/3/0/7/130740623/gufinopus.pdf
    • http://ardentbliss.com/uploads/1/3/0/6/130640094/7575e.pdf
    • https://nakebugix.weebly.com/uploads/1/3/0/2/130288394/e0ed465.pdf
    • http://nycraftworks.com/uploads/1/3/0/5/130590383/vonomagolifopi_kagisejatusiz_rerosujofem_lepurexuj.pdf
    • http://steeltec.us/uploads/1/3/0/6/130639665/663307.pdf
    • http://tickled-ink.co.uk/uploads/1/3/0/4/130476119/fulixubelu.pdf
    • http://norikiyohonda.com/uploads/1/3/0/5/130547038/serimal.pdf
    • http://mrramsay.co.uk/uploads/1/3/0/2/130271016/zudelubewolojigol.pdf
    • http://leepehgee.com/uploads/1/3/0/6/130620430/3ed72162cf7.pdf
    • http://carpetcleancary.com/uploads/1/3/0/4/130483872/130483872.html#coordinate+adjectives+practice+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012cb.bin
6e0f9e113e45ced24633a88169920dc9394715703ac0f86b3f684f546dcc9530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB 8052 bytes

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