PDF malware analysis — malicious · 049764b5d3d0f4de

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 13:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5ae460b89b14e1e947f5a285dea84677 SHA-1: 5a22bc10f9425dc84d3f572174f03e47cad30041 SHA-256: 049764b5d3d0f4de2f3441eecfccfcc6b8da2ee5b5d57c4e4ab0c3d8e7f91bfc

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF documents. The document body, though partially corrupted, contains the title 'Difference between illegal and legal' and the malicious URL, suggesting a lure to a phishing or scam page.

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.cc/wix?keyword=difference+between+illegal+and+legal
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/81d6a4_be23a4e2ed7a4cccb1fc63f7565519c8.pdf
- https://static.usrfiles.com/ugd/b8c837_189295f9b67f465890b07b2c896eb7bb.pdf
- https://static.usrfiles.com/ugd/625844_12ea5edf13424e75bfe9a61594f59056.pdf
- https://static.usrfiles.com/ugd/9734e7_0e1288ebda9f44c884ee9b294d069af0.pdf
- https://static.usrfiles.com/ugd/10e3af_7c7cf59187d142f1bb0f52d3d5641b56.pdf
- https://cdn.shopify.com/s/files/1/0432/0854/0324/files/23818208427.pdf
- https://cdn.shopify.com/s/files/1/0431/3432/0794/files/difference_between_analog_and_digital_cctv_camera.pdf
- https://cdn.shopify.com/s/files/1/0431/4726/4166/files/86299024398.pdf
- https://static.usrfiles.com/ugd/451461_2d2172fcce8e4066ae3930def75f2244.pdf
- https://static.usrfiles.com/ugd/8d57bd_7a649e26fbfc448aab08d01b913cbbbd.pdf
- https://static.usrfiles.com/ugd/b8c837_58cb417fc5a44158927dfaadcf54042e.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_off00006c2d.bin` `975aed717f44dd1ec288ec8c5c4d8340c5a92bded448882517566ad7a8666dc3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C2D	5240 bytes
`font_01_sfnt_off00007e23.bin` `121f2d6cd801929e08dab93d61f67210eda5c09a176f6acfc273bb4f9ef537bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E23	10072 bytes

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