PDF malware analysis — malicious · 4b28e7f4279cffc6

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 11:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0642dc3aba633c128096dad126a7f7a7 SHA-1: 7848e6ed90375996b71a9664a45151fd0db38969 SHA-256: 4b28e7f4279cffc6061d6827b205801b2bb5eac05173ebee4a44c8cb43eb21af

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO poisoning. One critical heuristic indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=operaciones+combinadas+con+fracciones+pdf', suggesting a lure to a malicious site. The ML classifier 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.com/wix?keyword=operaciones+combinadas+con+fracciones+pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdf
- https://cdn.shopify.com/s/files/1/0432/3796/5979/files/tewikomakesodaj.pdf
- https://cdn.shopify.com/s/files/1/0430/4017/8333/files/49747058388.pdf
- https://cdn.shopify.com/s/files/1/0431/6132/1634/files/driver_atheros_ar9485_asus.pdf
- https://cdn.shopify.com/s/files/1/0439/1695/1704/files/vofimuwamijenafa.pdf
- https://cdn.shopify.com/s/files/1/0434/8405/3669/files/35037580697.pdf
- https://cdn.shopify.com/s/files/1/0433/6196/0091/files/pizakavirifitafofet.pdf
- https://cdn.shopify.com/s/files/1/0427/5834/0774/files/87639262567.pdf
- https://static.usrfiles.com/ugd/b8c837_97576efa759d4dea8604a39c453731cc.pdf
- https://static.usrfiles.com/ugd/b8c837_f607206a59424d43b1c4598ecc782dd2.pdf
- https://static.usrfiles.com/ugd/b8c837_bf44151e82ed436e9b3b3569e274bc84.pdf
- https://static.usrfiles.com/ugd/b8c837_33ed2aa250824ee2b529c83309b153c1.pdf
- https://cdn.shopify.com/s/files/1/0435/5391/5043/files/98246099464.pdf
- https://cdn.shopify.com/s/files/1/0438/4319/0944/files/97098906981.pdf
- https://cdn.shopify.com/s/files/1/0436/5906/7557/files/beluruzupibofoj.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000060a3.bin` `d89f29a2374b08946e5c17905888412bd0ea66dd3b6adc54819ac08d5f08d700`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60A3	5144 bytes
`font_01_sfnt_off000071ed.bin` `064c513424cbc0994be7f973e7c25aec323d4712c9f46e331266c86640cd8eb0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71ED	10928 bytes
`font_02_sfnt_off0000957c.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x957C	4324 bytes

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