Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d7b6ffebec1a23…

MALICIOUS

PDF

40.6 KB Authoring application: Mobipocket Creator
MD5: 1f43fb9964efc70be2807991838cd84f SHA-1: 2d0079c9eb3e1fd1888dd1485242e90716bb29ad SHA-256: 33d7b6ffebec1a233c3ec418a10aafe69824276058425717bdd33394b62305ed
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and the presence of numerous external PDF links strongly indicate a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to downloading a PDF, aligning with the heuristic findings.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.irishhooley.com/uploads/1/3/0/6/130605149/9159015.pdf
    • http://dentaldivalicious.com/uploads/1/3/0/6/130621076/3dc229537.pdf
    • http://0frenchpolishing.com/uploads/1/3/0/8/130874485/toziwatunuw_jazenox_munevagewukema_bezufol.pdf
    • http://arteagadentistry.com/uploads/1/3/0/5/130541944/razekasovorigi.pdf
    • http://insuranceadvtg.com/uploads/1/3/0/4/130490078/kosewokikego-xesiwoxobije-putokekurofo-zakixur.pdf
    • http://www.printyoursport.co.uk/uploads/1/3/0/8/130813648/7100955.pdf
    • http://academicheadstart.com/uploads/1/3/0/4/130436272/fajepetesanisu.pdf
    • http://nyanyanizhniynovgorod.ru/uploads/1/3/0/5/130590666/lubikigifabi.pdf
    • http://aquawinner.com/uploads/1/3/0/6/130621243/geximudepa.pdf
    • http://www.diagnosticheskaya-karta.ru/uploads/1/3/0/5/130550952/palamijif_bunizumavizot.pdf
    • http://escamuel.org/uploads/1/3/0/5/130545043/3accf15a0d72.pdf
    • http://www.independenteyesrc.com/uploads/1/3/0/5/130539458/130539458.html#pre-algebra+with+pizzazz+answer+key+page+187

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000437f.bin
a6b8b95e304bf2df9b69d55bd1603cc030101faa22178806c797a514ccb59cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x437F 9768 bytes

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