Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f56c38b875d5a59…

MALICIOUS

PDF

44.4 KB Authoring application: PDFedit
MD5: dbe1be36730252e0b4ab945282b7b640 SHA-1: 66763449cc19ffa460a2b72c773aa9d5bfe225ac SHA-256: 8f56c38b875d5a593133039c8724faa5cafd9be06a1a278079848f3dc46c9b35
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO-based lure. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or traffic redirection intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lifteens.com/uploads/1/3/0/7/130776066/vuxovovomusimi.pdf
    • http://richardsnashall.net/uploads/1/3/0/2/130271226/lajosezim-rogewimol.pdf
    • http://februaryvioletwedding.com/uploads/1/3/0/5/130551654/vukigiribukarame.pdf
    • http://www.tagmusichk.com/uploads/1/3/0/5/130590321/5938734.pdf
    • http://matelaslitmural.com/uploads/1/3/0/6/130605149/6925476.pdf
    • http://skmmglobal.us/uploads/1/3/0/4/130491075/sumibakudofeberanen.pdf
    • http://www.hobbyhutltd.co.uk/uploads/1/3/0/8/130813510/sasiwu.pdf
    • http://knifelawinsider.com/uploads/1/3/0/8/130814303/8436234.pdf
    • http://www.nfldraftdays.com/uploads/1/3/0/6/130620213/959494.pdf
    • http://lisascentralcoast.com/uploads/1/3/0/6/130639246/kavokeburajasab.pdf
    • http://queensofhaute.com/uploads/1/3/0/4/130475959/824625.pdf
    • http://troypartners.com/uploads/1/3/0/4/130435843/7715348.pdf
    • http://mail.rocheblackbeltacademy.com/uploads/1/3/0/6/130621000/wusazud_doxuzakinub_mamewajiri_regizisimimope.pdf
    • http://alexanddeniaprocleaning.com/uploads/1/3/0/6/130639036/97dc2cf37.pdf
    • http://a1209599xstreamtravel.xsideas.com/uploads/1/3/0/6/130604752/130604752.html#acute+mesenteric+lymphadenitis+symptoms

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003e35.bin
de9ab7d3f801febf349f8627b7aa0c20fcf05f39190c656d73ff63bae9e1d702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E35 16040 bytes
font_01_sfnt_off0000553f.bin
a8f0d33c588678be387cd92b9f3285f1539d803e6b35c0a8c79f6a761262b25a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x553F 7508 bytes

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