PDF malware analysis — malicious · 6e990110acf6e783

MALICIOUS

PDF

46.5 KB Created: 2020-09-09 19:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 53f5608099833d185a3f9cd92acbec9c SHA-1: f2cd340bca184b4e71dd96115a09bb66c8ceeb93 SHA-256: 6e990110acf6e783a136ad1d8965e677fd11ba72f5c4f1875e197edd05b2a3c6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.club/wix?keyword=behringer+1202+mixer+manual
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/a107db_0d339782eaf54a9fac36bf33b7478228.pdf
- https://static.usrfiles.com/ugd/eda9ba_32631d5a79754cf88981236bb524361e.pdf
- https://static.usrfiles.com/ugd/89c6ad_4b916b8e17c64a8d92f42c4f0bc88b98.pdf
- https://static.usrfiles.com/ugd/2e16aa_565b4853602c4739a9938b6730bd3692.pdf
- https://cdn.shopify.com/s/files/1/0434/4479/7607/files/17496147649.pdf
- https://cdn.shopify.com/s/files/1/0461/8833/1161/files/pajizomusumizexiv.pdf
- https://cdn.shopify.com/s/files/1/0431/7665/7051/files/72157663611.pdf
- https://static.usrfiles.com/ugd/7f929b_ad406f70dfbe4f8eaabfe3b7795d8891.pdf
- https://static.usrfiles.com/ugd/361f4b_403ddde7ddca4bc7b6152b34f5c16496.pdf
- https://static.usrfiles.com/ugd/cf14a4_f48dcf623b194990bc528d65a5b959f8.pdf
- https://static.usrfiles.com/ugd/cafc24_0e2d1769027446e085d09e85c7d1c1c4.pdf
- https://static.usrfiles.com/ugd/50de67_c8f000863ee74193b72af286c7b93e01.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000765a.bin` `a34aaad2041a7627aae372e30eeca5df2ec4e8cd812d72a40a5a9c94c0dd8b4f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x765A	5364 bytes
`font_01_sfnt_off0000887f.bin` `adfed632a68856d4d1dee5a5b9dfd7a3db137d6254416e4af587b4420d4a17f4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x887F	10876 bytes

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