Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44363d6c3080650…

MALICIOUS

PDF

38.3 KB Authoring application: Nitro PDF
MD5: 17d661f64c7fe28fa3c2a33493b941c6 SHA-1: de5e536ad5ec0824a496ce8797fb0f6de272c9d8 SHA-256: d44363d6c3080650be168f00071df693c6819a59e627c449c5573cd8c709f438
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The embedded URLs suggest a phishing or malware distribution campaign. The document body, though heavily corrupted, contains references to 'Nitro PDF' and medical terms, possibly as a lure.

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://alaskacharr.org/uploads/1/3/0/7/130775883/565a7452929.pdf
    • http://ericazinter.com/uploads/1/3/0/2/130291591/duputat.pdf
    • http://georgiacrook.co.uk/uploads/1/3/0/4/130476760/d3def08.pdf
    • http://www.janekirby.info/uploads/1/3/0/7/130739265/4219431.pdf
    • http://jessicaconrad.net/uploads/1/3/0/5/130590029/reguwofixube-runovogara-sixisaguwupa.pdf
    • http://deadguyprom.com/uploads/1/3/0/8/130813528/9dabee9e8.pdf
    • http://aandnlawn.com/uploads/1/3/0/7/130739068/kumepaporisujedo.pdf
    • http://www.scottpreciousmetal.scottpreciousmetals.com/uploads/1/3/0/7/130739726/figane.pdf
    • http://sednin.blog/uploads/1/3/0/6/130604579/4af1a.pdf
    • http://cdwconstruction.co/uploads/1/3/0/7/130739816/mororefobon_senujusom_wopeganub.pdf
    • http://thendralgardens.com/uploads/1/3/0/3/130323984/9756e7ca.pdf
    • http://guanjunyulebaijiale.br3h.com/uploads/1/3/0/4/130478203/130478203.html#hernia+inguinal+o+crural+seram
    • http://deadguyprom.com/u

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f02.bin
dd6e27ef236cf6bc83a1c82eecc32cd293c1f79043f726f2a0cd4b8df4a3fb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F02 8864 bytes

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