Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4a27fdce563084…

MALICIOUS

PDF

39.0 KB Authoring application: OpenOffice.org
MD5: a7bac0025ee91eb553066b1e5b46b2ec SHA-1: 9ed9783f905d8554210385b81ed40689a72e2cb2 SHA-256: 8c4a27fdce56308476cc7c59bb02d74bda18b00915e8fb301bb83137c7b1624c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body text is largely unreadable due to encoding issues, but the presence of numerous external links is the primary indicator of 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://juhoatte.com/uploads/1/3/0/6/130640109/7628071.pdf
    • http://flyremote.com/uploads/1/3/0/3/130379266/livaparidumurixane.pdf
    • http://johnnyryanmusic.com/uploads/1/3/0/3/130379213/640508.pdf
    • http://shadowbendtest1.com/uploads/1/3/0/4/130476129/lijeforosugowup_filupo.pdf
    • http://stylogentlemensweekend.com/uploads/1/3/0/6/130604612/luziwuge.pdf
    • http://mrbaugher.com/uploads/1/3/0/2/130273803/154f5d2b8e1b.pdf
    • http://alexcapitalgroup.com/uploads/1/3/0/4/130483447/rukanelidono.pdf
    • http://lisacmathieson.com/uploads/1/3/0/4/130489523/kizirubotulos.pdf
    • http://webdisk.integritypump.com/uploads/1/3/0/4/130476816/puxureb.pdf
    • http://upholsterysewingmachine.net/uploads/1/3/0/5/130550732/6026681.pdf
    • http://littleraindancers.com/uploads/1/3/0/6/130605353/3563413.pdf
    • http://newstokenpool.com/uploads/1/3/0/5/130550675/novok.pdf
    • http://ilcornicello.com/uploads/1/3/0/4/130492963/3052386.pdf
    • http://mta-sts.mel.compagnierolandfurieux.fr/uploads/1/3/0/7/130775145/nojigif-zuwono-tafadiluguliwab.pdf
    • http://ladyboner.net/uploads/1/3/0/2/130288383/gajubome_tiposugasul_tumefotovibej_kupob.pdf
    • http://www.my-cobuilders.com/uploads/1/3/0/8/130813144/8347609.pdf
    • http://skmarketing.com/uploads/1/3/0/7/130739385/974397.pdf
    • http://eflrawfoods.com/uploads/1/3/0/6/130639651/a312d.pdf
    • http://lambertservisi.com/uploads/1/3/0/7/130740187/5885162.pdf
    • http://gemalchemist.com/uploads/1/3/0/6/130603895/4b8aa03.pdf
    • http://challengeyourlegal.com/uploads/1/3/0/5/130588679/99ff8.pdf
    • http://mx.musicforyouth.net/uploads/1/3/0/2/130270747/vobepenalilod-mamebo-wosabubuvoveva-zorozowaxeko.pdf
    • http://longchengyulecheng.br3h.com/uploads/1/3/0/6/130621645/130621645.html#most+common+cause+of+non+pitting+edema
    • http://mta-sts.mel.compagnierolandfurieux.fr/uploads/1/3/0/7/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003780.bin
a7318065b3d0b5f068f286cccb1baa3cd35b545db3339d933f715b161798ffed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3780 7848 bytes

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