Malicious PDF — malware analysis report

Static analysis result for SHA-256 1833c68229c003b8…

MALICIOUS

PDF

36.4 KB Authoring application: QPDF
MD5: aa4a5602d47be8a6be2be31f2497f002 SHA-1: b48fa314e1ebd96d346c592dbe69817ebd9b8929 SHA-256: 1833c68229c003b832a130a06c9e3b262aae5a5d89816ee4c1ac84a4ec6ec77d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, forming a link farm, which is a strong indicator of malicious intent, specifically for SEO poisoning or phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support this assessment. The document body, though obfuscated, mentions 'Macromedia flash 8 activation key' and includes multiple URLs, suggesting a lure to download a fake installer or exploit. No scripts were extracted, but the overall structure and embedded URLs point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://beezneezsausages.com/uploads/1/3/0/4/130435685/8837460.pdf
    • http://anne-denmark.com/uploads/1/3/0/5/130590082/vinunodasemabol_sitawuxoloxana_zezew.pdf
    • http://acpaasap.com/uploads/1/3/0/4/130488273/2189900.pdf
    • http://ashonfood.com/uploads/1/3/0/5/130589007/6688059.pdf
    • http://nicholemannion.com/uploads/1/3/0/6/130639438/e3e486bd8e01a56.pdf
    • http://annethielen.nl/uploads/1/3/0/4/130483270/supatoroso.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/5/130590508/130590508.html#macromedia+flash+8+activation+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001fc0.bin
0ea19579349a73cbbfed33b8d94ea4a5f029471efd25c5485ce1f9d2f37cc75c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC0 8812 bytes

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