Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdf954e4621be09…

MALICIOUS

PDF

47.8 KB Authoring application: QPDF
MD5: fe209f7e6891cf8fc16de2b0c8e49d5f SHA-1: 16ff185290fdd753a12785d71629480460219f3b SHA-256: dcdf954e4621be09dd15bed376fa6275a10b62fb457dc7e1950d2a0d9b794629
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags this as a phishing-related threat. The document body, though heavily corrupted, contains text related to 'maths formula pdf download', suggesting a lure to disguise the malicious link farm. The primary attack pattern involves redirecting users to a multitude of external PDF files hosted on various domains.

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://techjog.com/uploads/1/3/0/5/130544811/649b8d323.pdf
    • http://www.australiantrappers.com/uploads/1/3/0/6/130621051/lazadidaneduzod.pdf
    • http://minnesotahistorymuseums.org/uploads/1/3/0/4/130476687/zowepotoja.pdf
    • http://elevenelevensunset.com/uploads/1/3/0/2/130289688/fb7aa4ae3000a.pdf
    • http://www.scw8whedonstudiestv.com/uploads/1/3/0/4/130488493/zinuvofe.pdf
    • http://sprintboot.com/uploads/1/3/0/5/130550716/belipivamafaf.pdf
    • http://davidquy.com/uploads/1/3/0/5/130542948/dafis_zovemid_mixovovuz_femerepaxel.pdf
    • http://automaticpocketdoor.com/uploads/1/3/0/6/130639270/65d8c8cef.pdf
    • http://everydayolympian.com/uploads/1/3/0/5/130539338/9657215.pdf
    • http://centerofsacredpassage.com/uploads/1/3/0/3/130323527/nifub-vumasezazu-bilejularugusix.pdf
    • http://mygoodsforsale.com/uploads/1/3/0/5/130538831/fosagavuwisu.pdf
    • http://socialsolutionpro.com/uploads/1/3/0/3/130379522/bubavuti-madoxopex-xibowime-fukuzamodifi.pdf
    • http://nomoresound.com/uploads/1/3/0/4/130483990/papelabarijup-xodavujiw.pdf
    • http://millardproductions.com/uploads/1/3/0/2/130288565/9393742.pdf
    • http://ddscientific.net/uploads/1/3/0/6/130639263/fajamevovejer.pdf
    • http://tonoccus.com/uploads/1/3/0/3/130324004/1486426.pdf
    • http://beacloudaccounting.guru/uploads/1/3/0/6/130604550/nuteruda.pdf
    • http://keshvruddhiformula.com/uploads/1/3/0/5/130546759/vixifigob_tewafa_nalipozimutefe_jolekisow.pdf
    • http://webmail.dickersongreenseminary.org/uploads/1/3/0/5/130543671/niroza.pdf
    • http://toycity.com/uploads/1/3/0/4/130483631/buzezavole-jaxoximazibekop-fidatewat-wuzujonupu.pdf
    • http://suppy-taiwan.com/uploads/1/3/0/4/130476089/130476089.html#all+maths+formula+pdf+download
    • http://nomoresound.com/uploads/1/3/0/4/13048

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003cc4.bin
a38ee8fd1a481ff028b589837186a1f52a849342b9c5d754c7ab1fc87e2f8b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CC4 10580 bytes
font_01_sfnt_off00005b77.bin
b6309fda6bc053704f8adab4f839046c2f5e266c0f53671f390e300e5044cd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B77 7924 bytes

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