Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b93c11941a2828d…

MALICIOUS

PDF

48.8 KB Authoring application: LibreOffice Draw
MD5: 39013b750f79939ff2508282de35e90c SHA-1: 04da7b2f21703f8b98a4b0c31fb19333bd16c6ee SHA-256: 0b93c11941a2828d0179830406d6cb0e54a7dd5de86d9782a910c4e879aa8b6c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and an ML classifier also flagged it as malicious. The document body, though partially corrupted, contains text related to medical information, which may serve as a lure to disguise the malicious intent of linking to numerous external PDF files.

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://clarioncountygop.net/uploads/1/3/0/5/130590334/06ee342d.pdf
    • http://cpaforfamilywealth.com/uploads/1/3/0/3/130379272/ledepafof-kikubesuga-dusoxunazak-zitasik.pdf
    • http://scope-for-growth.com/uploads/1/3/0/2/130289240/zejanuwimiwamixun.pdf
    • http://karemes.zincadoexpress.com/uploads/2020/01/28/moposonu.pdf
    • http://crystalclearings.com/uploads/1/3/0/5/130588893/1437f0fe8745fd.pdf
    • http://solit.studio/uploads/1/3/0/5/130588813/xitiwabunupevatik.pdf
    • http://wesimul.windows10keys.net/uploads/2020/01/29/dijudij_vonafasek.pdf
    • https://levikujakezodu.weebly.com/uploads/1/3/0/4/130476821/2809486.pdf
    • http://bayareabackdoc.com/uploads/1/3/0/4/130479210/7bfefb9.pdf
    • http://diversified-resources.org/uploads/1/3/0/8/130814923/1bf5b6.pdf
    • http://carpetlands.com/uploads/1/3/0/6/130605344/nipojunoneguniwul.pdf
    • http://mymissblue.com/uploads/1/3/0/5/130588554/130588554.html#febrile+seizures+in+a+child+management
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001354.bin
f2b748ebc1d222d109ae0cd473802bbd570687ed0cb2f34d348aedac3f220240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1354 8780 bytes
font_01_sfnt_off00007905.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7905 16036 bytes

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