Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f33aa6eb6f6a0f7…

MALICIOUS

PDF

34.9 KB Authoring application: Poppler-utils
MD5: 84808153ecb3e9773287e892b5d5b350 SHA-1: b8645b0e493cd7e5e299e8997c87eab9f5682b51 SHA-256: 9f33aa6eb6f6a0f79a576e45cb42ccd4d0a16523830403ecca8a18c3a96f7b77
168 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDFs, indicating a link farm for SEO or malicious redirection. The document body, though heavily obfuscated, suggests a lure for downloading software, specifically Adobe Photoshop. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' and the presence of a remote-support tool lure further support a phishing or malware delivery intent. The primary attack pattern involves tricking the user into downloading a malicious PDF.

Heuristics 5

  • 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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://nextgenaccountingservices.com/uploads/1/3/0/6/130621525/pafajekukatowe-vepoku-repeg-rivejebifemozo.pdf
    • http://mta-sts.reconnectyourheart.com/uploads/1/3/0/6/130604812/028d9589195b7.pdf
    • http://sinmaps.com/uploads/1/3/0/6/130621805/dazabowaturap.pdf
    • http://animalsforprofit.com/uploads/1/3/0/3/130379316/6142584.pdf
    • http://animazioneteatrale.com/uploads/1/3/0/7/130738861/kiwitonu.pdf
    • http://cryptothermal.com/uploads/1/3/0/4/130436483/916ccbe19e01.pdf
    • http://auzmoki.com/uploads/1/3/0/5/130550708/refobegakibabegig.pdf
    • http://tradingpinshub.com/uploads/1/3/0/6/130621459/6030292.pdf
    • http://mentalhealthyouthteacher.com/uploads/1/3/0/2/130288549/jisun_pojake_xuravajekabob.pdf
    • http://chromamediatraining.com/uploads/1/3/0/5/130588635/basag.pdf
    • http://host49.carmichaelnl.com/uploads/1/3/0/5/130550775/130550775.html#adobe+photoshop+cs5+windows+10+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003237.bin
63258519eff80c68619745a65e7051d931048bcd8f3768db5f6533e6bc26aae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3237 7884 bytes

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