Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4603cd4470009f…

MALICIOUS

PDF

40.3 KB Authoring application: OpenOffice Draw
MD5: ff278407b98d62935d6292bd441ed789 SHA-1: 26d62a2592bac9f3203868e7f274a4d47a16c62e SHA-256: fc4603cd4470009f5f3462925790513b464d53066779c854bf599c74c5483301
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a lure to external malicious content. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious download intent. The document body, though heavily corrupted, contains a subset of these URLs, reinforcing their role in the attack. The primary goal appears to be directing users to download further malicious PDFs from the listed domains.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nuvif.chungthanhnien.com/uploads/2020/01/27/xenutumetavu.pdf
    • http://zaf.epiad.com/uploads/2020/01/28/kusivowevaxematixu.pdf
    • http://costamedicalmarijuana.com/uploads/1/3/0/5/130551019/xuvazedolijikugu.pdf
    • http://brian-amos.com/uploads/1/3/0/4/130475925/vorajetawoba.pdf
    • http://antivirusguardingservice.xyz/uploads/2020/01/27/7952575.pdf
    • http://newenglandcanna.com/uploads/1/3/0/4/130490117/xojew_dewukudiviw_kujusuligolan.pdf
    • http://positivitymagic.net/uploads/1/3/0/5/130551427/xorojasif.pdf
    • https://varomefifovewok.weebly.com/uploads/1/3/0/5/130551880/6311888.pdf
    • http://applesandbooks.com/uploads/1/3/0/6/130621805/wigugogil.pdf
    • http://rhettbenz.com/uploads/1/3/0/2/130287285/37a8d4c1ade.pdf
    • http://lsbdacademy.com/uploads/1/3/0/6/130621446/nesuxonusirekamuwin.pdf
    • http://jefferson.store/uploads/1/3/0/2/130270845/385be21e5299e7.pdf
    • http://methylationassociation.com/uploads/1/3/0/6/130621854/gifumitapipe-nuvesujobax-lodisojixofe-gawolu.pdf
    • http://mschris.net/uploads/1/3/0/6/130604313/zufibenade.pdf
    • http://shopcharlienewyork.com/uploads/1/3/0/4/130483710/mofowamelabufexixuno.pdf
    • http://jo-ocean.com/uploads/1/3/0/2/130287881/593656.pdf
    • http://mykindoffamily.com/uploads/1/3/0/2/130289347/pixudax.pdf
    • https://gomemevatenefu.weebly.com/uploads/1/3/0/4/130483830/7d12b6.pdf
    • http://myentouragemusic.com/uploads/1/3/0/4/130488311/130488311.html#baidu+root+app++for+android

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001572.bin
bc508dbdb958676207f7578bce32746d6c92ccc59610aec29b14290f611e2750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1572 8672 bytes

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