Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b2971541b0fbb3…

MALICIOUS

PDF

32.8 KB Created: 2020-08-12 04:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61e84442067cf3d40561e03e8cdba9d SHA-1: d7c89b38eb5e2c6128b8c8401588ab62cb97e2e4 SHA-256: c5b2971541b0fbb3ffcf50292d9fd58751dd25c8dc2c69af7209984c08a8afb2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. This suggests the PDF is designed to redirect users to malicious infrastructure, potentially for SEO manipulation or to serve further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.ru/pify?keyword=apqp+manual+2nd+edition+pdf
    • http://files.zainecoon.com/uploads/1/3/1/3/131378950/tobitekela-banuzajijosav-lubofagozu-binuwit.pdf
    • http://kepup.ksupayroll.com/uploads/1/3/0/7/130739789/96302d0f9c13f.pdf
    • http://files.redesignbyblaser.com/uploads/1/3/1/3/131384718/wugaburuvitan.pdf
    • http://files.anikosspa.net/uploads/1/3/1/6/131636834/tinijikej-lixokifir.pdf
    • http://jerukig.carpetfactoryoutletlondon.com/uploads/1/3/2/7/132740214/f3bf761f8029c4.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/95006657043.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/talespin_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/sedonenuxag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65939759823.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/10920001982.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/71195930130.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/schweser_secret_sauce_level_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/razuvenufeted.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043af.bin
4b67449867e847a9e33af279bc8f21c2bbfc133ea00ed362564d5cbb5e052a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43AF 5160 bytes
font_01_sfnt_off0000552f.bin
a9e9a44de43dd100f4a157f5e63017faca9fc0af574efe86bbcf4a44686a6b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552F 9700 bytes

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