Malicious PDF — malware analysis report

Static analysis result for SHA-256 afab90c4dddaf64b…

MALICIOUS

PDF

50.6 KB Created: 2020-08-30 12:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a98175a1257ea9ec270d2d7eb7df6fc9 SHA-1: 11c2fc6050f51881d29f71fa55614e12a0cf6f17 SHA-256: afab90c4dddaf64bf7880b8dc944780cd02c95e952f36dc247df85cc10793729
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=john+macarthur+libros+gratis+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous embedded links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=john+macarthur+libros+gratis+pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/muxonubuxojisedifewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/kokijamewarusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/nitep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/latest_skype_full_offline_installer.pdf
    • https://static.usrfiles.com/ugd/b80405_b4224057f3fe4c4eb047216948405617.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/99514364640.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/il_est_ou_le_bonheur_partition_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/pirabogazomuzokatelukojan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/3122829072.pdf
    • https://static.usrfiles.com/ugd/e4a001_e02f4251376342129b4112e027fddfd2.pdf
    • https://static.usrfiles.com/ugd/6cfc61_919e374211464647bbf34c8aa8333323.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a76.bin
bfc35e0a4faea52f9869502ce2289f9e9aefaca55ccb66126f9655ed83cbb800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A76 5464 bytes
font_01_sfnt_off00008cc3.bin
3d11c0d82033545c2d21634891604ac3204e44e8f7dc256df6584be5ed3ddf78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC3 10332 bytes
font_02_sfnt_off0000afe2.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE2 4324 bytes

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