Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a16e8e5c9ac07d…

MALICIOUS

PDF

43.5 KB Authoring application: LibreOffice
MD5: 685f43e6d8d583b8fd0ff474a4da1dfd SHA-1: 2597556b29095829bf822cac8fe5cb864f1095be SHA-256: d6a16e8e5c9ac07d1feba4ab9ce1c5042ad04f7ec0e766ad70b0045de1ad2d5d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This technique, identified as a PDF SEO link farm, is commonly used to distribute phishing content or redirect users to malicious sites. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall. No scripts were extracted from this sample, but the extensive link farm strongly suggests a phishing or malware delivery attempt.

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://gigizudox.evanstonfcu.com/uploads/2020/01/27/342ea92507ce.pdf
    • http://ruxizhang.com/uploads/1/3/0/5/130546385/6ef45a21be7661.pdf
    • http://paxofefat.pp-offer.fun/uploads/2020/01/28/kulusepuxagege_bedolesimako.pdf
    • http://shellkriterion.com/uploads/1/3/0/5/130590273/tejatupiwejobuladal.pdf
    • http://jocelynivancicinsurance.com/uploads/1/3/0/6/130605146/xukapev.pdf
    • http://pobubi.duplicatarta.com/uploads/2020/01/27/sokum-pazemiva.pdf
    • http://scalarealef1.com/uploads/1/3/0/6/130604770/107950.pdf
    • http://parif.land-booking.com/uploads/2020/01/28/gewos.pdf
    • http://jo-link.top/uploads/2020/01/28/66e20.pdf
    • http://kisigit.trytowin.fun/uploads/2020/01/28/0b9f084c06f.pdf
    • http://sal.owenwilson.ru/uploads/2020/01/27/wulufa.pdf
    • http://tripmakanangin.com/uploads/2020/01/29/087d0.pdf
    • http://truemusic75.com/uploads/1/3/0/6/130620601/9821657.pdf
    • http://laserstanki.ru/uploads/2020/01/29/150027.pdf
    • http://fosani.unikmetal.ru/uploads/2020/01/28/xedolugenivoke.pdf
    • http://penon.pleer.org/uploads/2020/01/29/matajugage.pdf
    • http://nejuda.youmindpower.win/uploads/2020/01/27/5720116.pdf
    • http://xawexegix.jintai.ru/uploads/2020/01/28/pazubi.pdf
    • http://mdp.gallery/uploads/1/3/0/3/130323342/walirimamuvigijuse.pdf
    • http://adamlazor.com/uploads/1/3/0/4/130488432/2d6134122233618.pdf
    • http://dickersonconstruct.com/uploads/1/3/0/3/130323900/fopit_rivum.pdf
    • http://zirefewi.tehnika-asko.ru/uploads/2020/01/28/9fa56e4b.pdf
    • http://kcbevco.com/uploads/1/3/0/2/130273846/130273846.html#diferen%C3%A7a+entre+solu%C3%A7%C3%B5es+coloides+e

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015e2.bin
72c1097320aad1a8abeb2f76d0970dc9978d46d344189610d56f5f5f5521ef1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E2 9328 bytes
font_01_sfnt_off00006198.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6198 16268 bytes

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