PDF malware analysis — malicious · 703ff5b4beb6a039

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 05:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d2583c9189ae12fbbe85eaf2c80894bf SHA-1: ad754d0095bc232808ee75b9fbe4f41b427908f5 SHA-256: 703ff5b4beb6a039d2a4833d6795734bb2c90f96925456a4b46376056d5be0a1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm of multiple external PDF documents, with the primary link directing to a known malicious redirector. This suggests an attempt to manipulate search engine results or to distribute further malicious content. 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.ru/wix?keyword=super+smash+flash+2+completo+no+clic
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_45a26af347bf4cd48890df87428c8328.pdf
- https://static.usrfiles.com/ugd/516793_f5c7724d1db54296b372885886ae6692.pdf
- https://static.usrfiles.com/ugd/12f4eb_08f381e91d804048be665c5869b11ae6.pdf
- https://cdn.shopify.com/s/files/1/0429/0910/6335/files/94697711376.pdf
- https://static.usrfiles.com/ugd/b8c837_5e2332e9d968435c90a88c7900c7f6ca.pdf
- https://static.usrfiles.com/ugd/b8c837_cdafefd7f2a64ac0a739e61e44f10ec9.pdf
- https://static.usrfiles.com/ugd/38bf1f_e3429421c5724618a577ea5ef70fcafb.pdf
- https://static.usrfiles.com/ugd/628a76_87589575b69f4e358fc1d401ee5e630e.pdf
- https://static.usrfiles.com/ugd/b8c837_136a7fb3610b45b89b3d2de77bad39f3.pdf
- https://static.usrfiles.com/ugd/b8c837_e2a383a491994bdb800dbf6807dcff9c.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005413.bin` `ffdecb23c9f88984d879695692527a2a32156d4d154d50a4578d472e592ec331`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5413	5492 bytes
`font_01_sfnt_off0000668c.bin` `e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x668C	1800 bytes
`font_02_sfnt_off00006f1a.bin` `d92c0e060d8165d6ee0070402d160d6a774a11f5badd19be3cbf0970455a692b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F1A	10352 bytes

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