Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b55adb47ddaf650…

MALICIOUS

PDF

93.4 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: 49c7656d66d2c4734e2eea89f6cef67f SHA-1: 6959d005e1cf280a5250860d39b9809039fd80f2 SHA-256: 2b55adb47ddaf650a3ac079818d7e833b22f64133e506f5f82c80daf08fcd554
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious intent. The document body, though heavily corrupted, also contains references to these external URLs, suggesting a coordinated effort to redirect users to potentially malicious content. The primary goal appears to be SEO spam or phishing through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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 https://bagosinoz.weebly.com/uploads/1/3/0/5/130550756/9510688.pdf In PDF document text
    • http://studyoverseasblog.com/uploads/1/3/0/5/130589216/xagol.pdfIn PDF document text
    • http://dopox.x-print.uz/uploads/2020/01/29/ca67a7f336106b.pdfIn PDF document text
    • https://ziwubojifu.weebly.com/uploads/1/3/0/4/130491001/zesaworabavude-runogodax-paxogelakapas.pdfIn PDF document text
    • http://simu.coldmineral-soap.com/uploads/2020/01/27/1619044.pdfIn PDF document text
    • http://nope.oldi-nix-dns.info/uploads/2020/01/28/zusugemafuse.pdfIn PDF document text
    • http://thefreshestllama.com/uploads/1/3/0/5/130538866/kirefujazolonavikir.pdfIn PDF document text
    • http://vipiski-besplatno30.icu/uploads/2020/01/27/c74afee75f0c.pdfIn PDF document text
    • http://wlez.org/uploads/1/3/0/4/130488694/koworew.pdfIn PDF document text
    • http://jodadena.forexpro-au.club/uploads/2020/01/28/9881226.pdfIn PDF document text
    • https://rewakelara.weebly.com/uploads/1/3/0/5/130588861/kolepumup.pdfIn PDF document text
    • http://nidabegop.skazkashow.ru/uploads/2020/01/28/newuxazasewiwegajupi.pdfIn PDF document text
    • http://ccrwildgameprocessing.com/uploads/1/3/0/6/130621663/3753676.pdfIn PDF document text
    • http://biotechenvironmental.net/uploads/1/3/0/4/130436095/20e0e69.pdfIn PDF document text
    • http://taylorbethbland.com/uploads/1/3/0/6/130604537/7098281.pdfIn PDF document text
    • http://feerverk-spb.ru/uploads/2020/01/29/9553801.pdfIn PDF document text
    • http://bestperles01.fun/uploads/2020/01/28/satolikiwopameve.pdfIn PDF document text
    • http://diebeziehungsshow.de/uploads/1/3/0/6/130620764/130620764.html#watch+detective+conan+movie+8In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131 9424 bytes
SHA-256: 3d56b066d81cbf8abfee66ca8e36b96821e4ef2a5c4875634cb023488a4c366a
font_01_sfnt_off000097c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C2 16216 bytes
SHA-256: 56791972fa3ee67c423ebb7c2f6ecbb9cd08a7d5a19461c80fab41667197a823
font_02_sfnt_off0000b143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB143 48828 bytes
SHA-256: a714debc1a4f5100e8221b406a05d8cf37a6dfa25aa8291ed834275bb62e7fda

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