Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a9d5bf958216b3…

MALICIOUS

PDF

114.7 KB Authoring application: Serif PagePlus
MD5: 1fcd2eb990b9f631a0f002e2d2b67a69 SHA-1: 857d395bd27096b272e2dd30a4d31ba1499ce166 SHA-256: f0a9d5bf958216b3b499d6e2e8192f699b165e4466e02f38f32910a93b55eaa0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://messydesk.org/uploads/1/3/0/6/130621148/dedisibinadosufej.pdf
    • http://immigranthope.net/uploads/1/3/0/2/130289721/zokizu.pdf
    • http://artintimidatinglife.com/uploads/1/3/0/4/130476878/2598498.pdf
    • http://abilenecares.org/uploads/1/3/0/5/130588802/kokisajofemurit.pdf
    • http://site.ardec.com/uploads/1/3/0/8/130813827/bijetilebuxukijunet.pdf
    • http://actamsea.org/uploads/1/3/0/6/130621441/048103.pdf
    • http://www.carolina-conjure.com/uploads/1/3/0/6/130605521/9031417.pdf
    • http://novamedia.dk/uploads/1/3/0/6/130605358/wogitudodomuba.pdf
    • http://windsorwesley.com/uploads/1/3/0/4/130476075/604042.pdf
    • http://14dayreset.com/uploads/1/3/0/5/130544541/zofemurureparel.pdf
    • http://hostmaster.ukbusinessradio.com/uploads/1/3/0/2/130272327/9918183.pdf
    • http://trafficsecretswaitlist.com/uploads/1/3/0/6/130639143/kuvabipixiz-wokelosozopoba-mewanemafobi.pdf
    • http://balonskydancer.net/uploads/1/3/0/6/130621143/jarowukesijiwukelebe.pdf
    • http://blackhawbuilders.com/uploads/1/3/0/3/130379514/130379514.html#jazz+fusion+licks+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005116.bin
83e82bda21f86c2d03df5f75c6deb847ec758649f103f79bbd64bc130f77b43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5116 7768 bytes

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