Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9a4804ef211f4f…

MALICIOUS

PDF

42.6 KB Authoring application: GIMP
MD5: c2f56b5d7cd42c81ab305951597d3c2e SHA-1: db3f345551beeb88d87ba1bf015d27df13a6a35a SHA-256: 5f9a4804ef211f4f380df18e3c7deb2b7e19cb98524b41d8e6013a5a3a7e174e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute further malicious content. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or traffic redirection scheme. While no scripts were extracted, the sheer volume of outbound links suggests a malicious intent to redirect users to potentially harmful sites.

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://asharperimage.ca/uploads/1/3/0/4/130436313/7102291.pdf
    • http://biking4life.org/uploads/1/3/0/6/130604863/1309528.pdf
    • http://alttoronto.org/uploads/1/3/0/8/130874308/feredatodiribu-nugexovikag.pdf
    • http://webmail.goddessrockstararts.com/uploads/1/3/0/6/130639998/7ade58d65b.pdf
    • http://grupit.com/uploads/1/3/0/5/130590481/0a484c551c.pdf
    • http://hostmaster.vegasvoicelessons.com/uploads/1/3/0/5/130546657/poxovekupalu.pdf
    • http://wd-consult.com/uploads/1/3/0/4/130478481/govoxesirewedepefi.pdf
    • http://blufftonchurch.org/uploads/1/3/0/6/130639500/fbeed92f1.pdf
    • http://andrewtimmer.com.au/uploads/1/3/0/4/130476413/risagod.pdf
    • http://nataliewalschots.net/uploads/1/3/0/3/130313766/xifemi.pdf
    • http://photosandburritos.com/uploads/1/3/0/5/130550704/9080344.pdf
    • http://www.bulkchemicalservices.com/uploads/1/3/0/7/130775176/f81ea.pdf
    • http://drainetfissures.com/uploads/1/3/0/7/130775002/rebon.pdf
    • http://dueoutdoors.com/uploads/1/3/0/5/130544754/3338097.pdf
    • http://www.msealsphotography.com/uploads/1/3/0/2/130272267/nutarobek.pdf
    • http://voctechinternational.com/uploads/1/3/0/7/130775282/5586022.pdf
    • http://opportunitypalestine.us/uploads/1/3/0/6/130639565/lenudira.pdf
    • http://www.lefarigouye.com/uploads/1/3/0/7/130739142/wajolurumowuji.pdf
    • http://host152.carmichaelnl.com/uploads/1/3/0/6/130639099/130639099.html#grammar+active+voice+and+passive+voice+examples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a5b.bin
d2b87cc2ae360ada59b656e6ea772f822129097620e967ff75117c1ac870df04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5B 7680 bytes

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