Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b7d958a1ae0fa3…

MALICIOUS

PDF

34.8 KB Authoring application: OpenOffice Draw
MD5: 4cad95d360a0eb11c0eb0cc91375191e SHA-1: d4f515c9cb71b9324cf4053476031d59f1847c0a SHA-256: 45b7d958a1ae0fa32185bbc8426bdd9622440ff4b7c77387aad5051189a2c67e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body, though partially corrupted, mentions 'Light refraction worksheet answers', suggesting a lure to disguise the malicious link farm. The primary attack pattern involves redirecting users to a series of potentially malicious PDF files hosted on various domains.

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://dayakquest.com/uploads/1/3/0/5/130539935/8865405.pdf
    • http://corpseapple.com/uploads/1/3/0/4/130483766/bozuminaka-kuduzinep.pdf
    • http://besthairreplacementnc.com/uploads/1/3/0/3/130313307/namafedomixifabawar.pdf
    • http://iglesiamulticulturalwestside.com/uploads/1/3/0/6/130640208/8263272.pdf
    • http://asthethirdworldinnorthamericaturns.com/uploads/1/3/0/6/130604798/3534aa5411b.pdf
    • http://societasstudiorumamdg.com/uploads/1/3/0/6/130639875/7939440.pdf
    • http://polun.audiostart43.icu/uploads/2020/01/28/fa072b2d.pdf
    • http://charliemorrisey.org/uploads/1/3/0/6/130604782/bejokijubejiwa.pdf
    • http://preschoolhouse.com/uploads/1/3/0/6/130639178/lapowuguniz-laxamapo-dulajemagodunak-pesigodezer.pdf
    • http://amudyomi.net/uploads/1/3/0/5/130542965/tedorivijinagob_suxer_foxutetagaxo.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/5/130538880/130538880.html#light+refraction+worksheet+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012fe.bin
edafc1a32f80289f9b278a822ca96f22e7f1c5da13cdb1cc3d2d0d5fc2bfc2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE 8600 bytes

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