Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d51f3a65d71f18…

MALICIOUS

PDF

44.0 KB Authoring application: Serif PagePlus
MD5: 4f96081f034475839e04d521a153b25d SHA-1: 0e64a95f051346fd9640d1b0c19363cd679bb0ca SHA-256: 20d51f3a65d71f18fcfc08ce46640171253a6a9384368844456316494bc10611
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to host phishing content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body itself is largely garbled but contains some of the same URLs, reinforcing the link farm nature of the document.

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://jiwu.iceworld.fun/uploads/2020/01/28/635d23.pdf
    • http://princetoncycling.com/uploads/1/3/0/4/130476119/944084.pdf
    • http://robinsnestfunraiser.org/uploads/1/3/0/3/130312916/pelog_rilawasapu.pdf
    • http://teli.nano35.com/uploads/2020/01/27/4898775.pdf
    • http://aspirecrossfit.com/uploads/1/3/0/5/130588712/ba356eb3.pdf
    • http://nit.tsecur.com/uploads/2020/01/29/vivukebufegodapu.pdf
    • https://dunebemojovok.weebly.com/uploads/1/3/0/5/130539231/rijivebonusiton-papinowar-feladur.pdf
    • http://thrivelodi.com/uploads/1/3/0/6/130605237/ranotufapu.pdf
    • http://billyslittlebench.com/uploads/1/3/0/6/130605285/7452226.pdf
    • http://healthcsi.com/uploads/1/3/0/4/130478704/tajadevoguxalez.pdf
    • http://lgbelectricalcontracting.net/uploads/1/3/0/4/130476141/1899921.pdf
    • http://xeke.vipiski-besplatno64.icu/uploads/2020/01/28/sajorunoku.pdf
    • http://evokefitness.net/uploads/1/3/0/4/130493476/130493476.html#death+prophet+dotabuff+guide

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014c9.bin
cc79fdc289584c59bf8b40a78e462d5c2d4878ae5fbbde6e12de1152db3bfdd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9 12704 bytes
font_01_sfnt_off000064df.bin
285b4a972f2f055d9429ab10bc20f1fedb01fe1a7ca51db6b3ff63b7b7efd801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 16220 bytes

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