PDF malware analysis — malicious · 806859baff2245ff

MALICIOUS

PDF

38.6 KB Created: 2020-11-01 23:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ba4f3164770e93cf3321caf0d73a1874 SHA-1: 78d72996fe4c174eba15fd8864a5e3a9bfad1005 SHA-256: 806859baff2245ffb3eb1895b6b9929c8245ceb5a85a84722f020a1ffb87dfdd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?keyword=tatcha+deep+cleanse+exfoliating+cleanser'. The document body also contains this URL along with numerous other links to PDF files hosted on S3 and Shopify, suggesting a link farm designed to distribute malicious content or engage in SEO poisoning. The ML classifier also 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://gettraff.ru/123?keyword=tatcha+deep+cleanse+exfoliating+cleanser
- https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/c02b73b02a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wilugugo/kowewebabe.pdf
- https://cdn.shopify.com/s/files/1/0431/7587/0630/files/zaxipimovitipevixul.pdf
- https://cdn.shopify.com/s/files/1/0465/7600/9383/files/zelawev.pdf
- https://s3.amazonaws.com/rebomedug/85666523029.pdf
- https://s3.amazonaws.com/fibesezati/54052755234.pdf
- https://cdn.shopify.com/s/files/1/0496/8880/5533/files/femupotoku.pdf
- https://s3.amazonaws.com/towakog/prince_of_bel_air_theme_song_lyrics.pdf
- https://s3.amazonaws.com/rodigapigeta/motokomejogakele.pdf
- https://cdn.shopify.com/s/files/1/0505/5555/1909/files/tree_of_savior_cleric_guide_2020.pdf
- https://cdn.shopify.com/s/files/1/0482/7142/5697/files/wasotepibakanepolujo.pdf
- https://cdn.shopify.com/s/files/1/0503/8456/8472/files/93893307090.pdf
- https://s3.amazonaws.com/wanasuvedigo/midawanadixesasolobejej.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_off00005e0a.bin` `dfa481fe416d871c01197e3c8e62c72c99b1c067d2f202a7f1346b63f4db04ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E0A	5432 bytes
`font_01_sfnt_off00007085.bin` `e343d1ce0f8116caf3d3641f238c2ec6f9ee9aa1d95b2f3c482a2a93886374f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7085	8424 bytes

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