PDF malware analysis — malicious · c1dc234f0ff54105

MALICIOUS

PDF

48.7 KB Created: 2020-09-01 00:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3392b80e20cac1796a89af80f7d0ca5e SHA-1: 60b328119deb941c522fe0edebda55db1b8b1039 SHA-256: c1dc234f0ff541055663993a1c4319c73d0976acc3b07b4a321be219c4884812

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.com/wix?keyword=how+to+analyze+financial+statements+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is intended to lure users to malicious infrastructure. The ML classifier also 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.com/wix?keyword=how+to+analyze+financial+statements+pdf
- https://static.usrfiles.com/ugd/b8c837_f9e2b75fe5cf49abb033ac07ce16b3c0.pdf
- https://static.usrfiles.com/ugd/9b5f63_4e293103e1514f609c639de4b404b492.pdf
- https://static.usrfiles.com/ugd/0c8cc8_9005def7337441db8bd9df3e56b94952.pdf
- https://cdn.shopify.com/s/files/1/0428/8738/1155/files/15437956798.pdf
- https://cdn.shopify.com/s/files/1/0431/3769/5906/files/chest_workout_plan.pdf
- https://cdn.shopify.com/s/files/1/0438/6324/4960/files/bengali_food_festival_menu.pdf
- https://cdn.shopify.com/s/files/1/0431/6528/6549/files/fiche_mtier_guide_touristique_pole_emploi.pdf
- https://cdn.shopify.com/s/files/1/0429/0838/5439/files/5989537105.pdf
- https://static.usrfiles.com/ugd/fa32a6_18a360dcce9d4d0ebca7dfea15e954b2.pdf
- https://static.usrfiles.com/ugd/b8c837_436d222b5ad2406e8b732ce8670b9841.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_off00006bc4.bin` `565c9391c56b3c636e4e887ec6b30b91435703b72bdaae2a58035bdb138e519e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BC4	5196 bytes
`font_01_sfnt_off00007d83.bin` `d2e114accce90c666a36a747e7d69e468b74db0caf18bc5730213675dbdf0d8e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D83	13400 bytes
`font_02_sfnt_off0000a853.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA853	4324 bytes

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