Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f905f2ebadf293f…

MALICIOUS

PDF

41.4 KB Authoring application: Karbon First seen: 2020-09-24
MD5: 940f0fb755c7b1732407fb248f82cf1a SHA-1: b99fc18f201a3f0b75fc56ca50f6b31888db58e1 SHA-256: 1f905f2ebadf293f270525e9d351959c1552890ac5c8c3eb368496eec00e476a
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV heuristic also flags this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', further supporting a phishing or malicious distribution intent. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the immediate payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://financialcleansing.com/uploads/1/3/0/6/130620478/taronobinajigujalo.pdf In PDF document text
    • http://mountaingalsbookkeeping.com/uploads/1/3/0/5/130588858/kijibimenonunu.pdfIn PDF document text
    • http://princessponyclub.com/uploads/1/3/0/4/130483350/c56194fb740d29.pdfIn PDF document text
    • http://esyllabusforafrica.org/uploads/1/3/0/6/130640178/mukemepavokoso.pdfIn PDF document text
    • http://olympicvillagerentalsvancouver.com/uploads/1/3/0/5/130541000/vajobamefipuni_sivisoxifuvukep_pogiraso.pdfIn PDF document text
    • http://www.radioactiveglass.com/uploads/1/3/0/8/130813768/33939c07.pdfIn PDF document text
    • http://theknittingroom.co.uk/uploads/1/3/0/8/130813651/zefuxelusejeb.pdfIn PDF document text
    • http://smithmountainlakedayschool.com/uploads/1/3/0/8/130874136/baxosazavofidal_vakidamaboxij_siduvizuje_lajawo.pdfIn PDF document text
    • http://littlefeatherbooks.com/uploads/1/3/0/5/130539223/2de365bc6a685.pdfIn PDF document text
    • http://marthasvineyardhistory.com/uploads/1/3/0/5/130550775/jarefabararu.pdfIn PDF document text
    • http://ademie.com/uploads/1/3/0/5/130543787/kozodifefekile_kisugiwilo_natavi.pdfIn PDF document text
    • http://www.bvcustomsewing.com/uploads/1/3/0/4/130488332/bubamigikiwujatev.pdfIn PDF document text
    • http://mpassociatesrealtors.com/uploads/1/3/0/7/130776219/7799076.pdfIn PDF document text
    • http://speakup.london/uploads/1/3/0/7/130738973/gujin-dakexagodogu-kekuxidexi-sakokutulejabi.pdfIn PDF document text
    • http://chrisarkwright.com/uploads/1/3/0/5/130551896/2740405.pdfIn PDF document text
    • http://southlandpawn.net/uploads/1/3/0/3/130313564/doxejanudefijelaferi.pdfIn PDF document text
    • http://cbacreditcard.com/uploads/1/3/0/3/130379231/bugafuro.pdfIn PDF document text
    • http://74-123-77-253.mgwnet.com/uploads/1/3/0/8/130813967/130813967.html#reading+comprehension+grade+5+pdf+freeIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E9 7904 bytes
SHA-256: 077e573e895e92481399c3e822ad381bf7c881902991d0d6135590f372c0c91a

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