PDF malware analysis — malicious · f2598fea0792c8fa

MALICIOUS

PDF

37.4 KB Created: 2020-09-01 21:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0e444d1a64fa710e1ef8cbfeb1834751 SHA-1: 1f21a781123e5ec0368fd2d2a1ef5d6f948d66d5 SHA-256: f2598fea0792c8fa0e40a17528a45cf4d308aa0773e42b0cb280008b2fb9759f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to distribute malicious content or phish users. The ML classifier strongly supports the malicious nature of this PDF.

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=ghanshyam+darode+answer+picture
- https://static.usrfiles.com/ugd/b8c837_c2cdf11cf77d41e495478a8651f93925.pdf
- https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
- https://static.usrfiles.com/ugd/b8c837_e824070f6e1745b1bfb4cc3cb22c099a.pdf
- https://static.usrfiles.com/ugd/b8c837_f60e6bf37bba49bab33a35556f3a8162.pdf
- https://static.usrfiles.com/ugd/c345b0_85cafbce0b404225b377918f90ece482.pdf
- https://cdn.shopify.com/s/files/1/0437/2620/9175/files/php_password_protected_page.pdf
- https://cdn.shopify.com/s/files/1/0432/6345/9486/files/86054721611.pdf
- https://static.usrfiles.com/ugd/a2c2bc_7d5a3060cec743e8ac80c85526aeb6b5.pdf
- https://static.usrfiles.com/ugd/70a38d_43fb947e85034b468a0b963f227186bf.pdf
- https://static.usrfiles.com/ugd/b8c837_d8db61c4f5e14e4f851e78469309912c.pdf
- https://static.usrfiles.com/ugd/fbccce_d7808136968740be9553c7ba172ffa6a.pdf
- https://static.usrfiles.com/ugd/9374a7_e93cca14a33b4b908052753f1482b2f6.pdf
- https://cdn.shopify.com/s/files/1/0427/4877/2508/files/dujipixunu.pdf
- https://cdn.shopify.com/s/files/1/0428/5267/9836/files/explain_the_agents_of_socialization.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_off000053ff.bin` `a18b45cbb14f82e23ce7dbd7976b6b9c5e2e92e2a6bb381dc63a60230a49fe2d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x53FF	5508 bytes
`font_01_sfnt_off000066a6.bin` `de338910c18f0cf84a87592ca3d31364b0a96c6e293c4194818aab3f4566d7c1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66A6	10024 bytes

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