Malicious PDF — malware analysis report

Static analysis result for SHA-256 8474f6fb42706cb9…

MALICIOUS

PDF

33.4 KB Authoring application: LibreOffice
MD5: c8882f8546725679973ee55911ccd4d0 SHA-1: b5eb4dcf54786b2cfafdde547ef2ed5efba9c830 SHA-256: 8474f6fb42706cb9c1068434cdaca699226447fc66b95a7481cc6491d20f47ae
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support its malicious nature. The document body, though partially corrupted, mentions 'Children's tylenol mg/kg', suggesting a lure related to medication information to entice users to click the embedded links.

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://bluemonstercellars.com/uploads/1/3/0/7/130775865/dibugibex-xilaramolev-voxim.pdf
    • http://mobilegeneratorservice.com/uploads/1/3/0/7/130776478/6786ff76d0.pdf
    • http://global4xloan.com/uploads/1/3/0/6/130620209/096a66a6d.pdf
    • http://rockinghamprecisionmetalworks.com/uploads/1/3/0/6/130620865/sokebokogumaveso.pdf
    • http://patriciahopkinsbarnesfineart.com/uploads/1/3/0/6/130622038/618fe2778840f.pdf
    • http://rasconsultingfirm.com/uploads/1/3/0/6/130621874/6082819.pdf
    • http://ntagent.com/uploads/1/3/0/2/130272488/d1652216.pdf
    • http://newkids.co.uk/uploads/1/3/0/4/130488666/2787161.pdf
    • http://northjerseydirectmail.com/uploads/1/3/0/7/130776585/2642388.pdf
    • http://namedtrust.com/uploads/1/3/0/3/130323106/44c9af5ffab8.pdf
    • http://kaping.org/uploads/1/3/0/6/130603959/2016478.pdf
    • http://cecilyeiferle.com/uploads/1/3/0/9/130969813/130969813.html#children%27s+tylenol+mg%2Fkg
    • http://northjerseydirectmail.com/uploads/1/3/0/7/13077658

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ba6.bin
10dc6bc8ebc99d8e7b77bcb3203c5e85c8eeb2df83d6f4d7e19bb388d62cb1df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA6 7932 bytes

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