Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd0eb3db3fe6336…

MALICIOUS

PDF

46.8 KB Authoring application: OpenOffice.org
MD5: a21e61dd279ff971c6c983605623a1db SHA-1: d91c42a761c9ccdb9b2334a2619d33f7c65a4fc3 SHA-256: 9cd0eb3db3fe6336db25e485f6757506bcfb593c938279de91cb80b08e0ffda8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body is heavily obfuscated and does not provide clear textual clues, but the heuristic firings and numerous external links are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://nicosnerdnews.de/uploads/1/3/0/7/130776131/3892390.pdf
    • http://crazyandcraftymom.com/uploads/1/3/0/3/130323693/32f09b88.pdf
    • http://birkdaleawards.com/uploads/1/3/0/3/130323411/2543006.pdf
    • http://www.mauinuiwomen.com/uploads/1/3/0/6/130620728/migivenodaturulov.pdf
    • http://www.santanamavericksbarandgrill.com/uploads/1/3/0/2/130270905/3833339.pdf
    • http://mobilecraftbottlingcompany.com/uploads/1/3/0/6/130620868/eb6151f4cdeb45f.pdf
    • http://www.firstfamilyfleetservices.com/uploads/1/3/0/5/130550874/rufovar.pdf
    • http://performanceinc.club/uploads/1/3/0/5/130588943/revenipavodoj.pdf
    • http://bonkerforbyram.com/uploads/1/3/0/5/130544386/3129972.pdf
    • http://www.thedistrictfairpark.org/uploads/1/3/0/9/130969748/679c1c1f687dc.pdf
    • http://www.beachshackboutiqueandtanning.com/uploads/1/3/0/2/130289063/865a13.pdf
    • http://wonderwomanchildren.com/uploads/1/3/0/2/130289186/piguvulebe_wepopefiwameje_tajamezi_natuzikosovef.pdf
    • http://ahbizservices.com/uploads/1/3/0/7/130738725/befotapib-tajixu-zakigonujawaki.pdf
    • http://theemeraldstone.net/uploads/1/3/0/3/130379959/dewemadoxe-mokifudib.pdf
    • http://behaviourvet.co.nz/uploads/1/3/0/5/130539442/d3c16e2d4a.pdf
    • http://tastinggame.eu/uploads/1/3/0/7/130775248/4a28ef668e.pdf
    • http://prismrva.com/uploads/1/3/0/6/130621307/1913701.pdf
    • http://driftwithme.com/uploads/1/3/0/9/130969647/kugut.pdf
    • http://telegraphhouse.eu/uploads/1/3/0/6/130639744/kizovateferut.pdf
    • http://www.getbakedpottery.com/uploads/1/3/0/8/130873841/130873841.html#arb+locker+free+compressor
    • http://www.santanamavericksbarandgrill.com/uploads/1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005767.bin
1d4678a9216e0f420a1d554e91f1eaf502d6e76a7458f333dbfe4788b31fd6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5767 8640 bytes

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