PDF malware analysis — malicious · 57a4024e05eb551f

MALICIOUS

PDF

35.2 KB Created: 2020-08-30 01:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d0891b66e079c224769f94c4caece615 SHA-1: a02c243476a3c3c33d54b4f9a7e31dc05a83e6c7 SHA-256: 57a4024e05eb551f4edf606f53809fab4c6e36be5dca9f9b2ee4b9d666abff4f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a movie download, which leads to the URL https://ttraff.ru/wix?keyword=tres+metros+sobre+el+cielo+descargar. The document also contains a mass of external PDF links, many hosted on Shopify, likely for SEO manipulation or to obscure the primary malicious link. The ML classifier strongly indicated maliciousness.

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.ru/wix?keyword=tres+metros+sobre+el+cielo+descargar
- https://cdn.shopify.com/s/files/1/0439/1151/2232/files/97244827074.pdf
- https://cdn.shopify.com/s/files/1/0467/5724/9187/files/dhoom_2_hindi_full_movie_download_300mb.pdf
- https://cdn.shopify.com/s/files/1/0434/9558/8005/files/radio_times_tv_guide.pdf
- https://cdn.shopify.com/s/files/1/0432/7351/9269/files/mahabharata_quiz_questions_and_answers_in_sanskrit.pdf
- https://cdn.shopify.com/s/files/1/0433/8024/4641/files/ncert_sociology_book_class_11.pdf
- https://cdn.shopify.com/s/files/1/0433/0825/3344/files/zukipiwululiz.pdf
- https://static.usrfiles.com/ugd/8cbfce_bfd5ca0ec4b0432b9254dbde91189bc0.pdf
- https://static.usrfiles.com/ugd/b8c837_3f4f84a6a05a415fadeb236f94690782.pdf
- https://static.usrfiles.com/ugd/5899d5_aed85c23b84843f28f94ef12a95d46bd.pdf
- https://static.usrfiles.com/ugd/b8c837_275cda56b0994275b542f2aee5bec5c1.pdf
- https://static.usrfiles.com/ugd/314c35_d002abab8ac343e28f59dc79a880c967.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000048e7.bin` `6e77edf640b132889608329b8d227abc5cf83538efb3442c237f24640a7adaa2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48E7	5348 bytes
`font_01_sfnt_off00005af6.bin` `586a252b8824fa90ae53d0b47ad4757e1fe1a107ea3ca5b0bcf7a8e54b1ca5b9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AF6	11032 bytes

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