Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fbeb7f63c2e8c2…

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 13:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a700c63c0a6cb707934350062d92b52b SHA-1: 6c7685c30ad1abd29e597d6f480557b046081b37 SHA-256: 97fbeb7f63c2e8c228e60e0706060062510f3b2a54c66106817c608743c9b970
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though obfuscated, contains the text 'Biafra national anthem pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing a mass of external links.

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.com/pify?keyword=biafra+national+anthem+pdf
    • http://files.drlukellc.com/uploads/1/3/2/6/132681452/8850057.pdf
    • http://files.naledgeevans.com/uploads/1/3/2/6/132695915/kadakigadid.pdf
    • http://wibefade.thebrockenhursttaxis.com/uploads/1/3/2/7/132710712/3858359.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/74714086890.pdf
    • https://cdn.shopify.com/s/files/1/0437/7460/7514/files/97736281799.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3792/files/bit._ly_2onbep4.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/87256679510.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/51513931335.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/all_cheats_of_gta_san_andreas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/subenitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/dukezizupivitutov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/poe_bound_fossil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/12081541687.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/solr_delete_all.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_off00005ab1.bin
14c8c3c3fd0cdda63b3b29f9cb2eeab7346f5cca1a8f2b55d31773e5aa6993c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB1 5152 bytes
font_01_sfnt_off00006c0c.bin
7aa7701c8b49a502a0eecf284bcb5817570d62073aa399800658a1160c935098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0C 10076 bytes

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