PDF malware analysis — malicious · ab5f290c0252acdc

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 14:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 11404a44e21bc96ce2855dd29cf65606 SHA-1: d8da7cf5f98555113853d698ea80786530cffc4c SHA-256: ab5f290c0252acdc2c1f1e6a5c446dc508bb5d9877652a9af8e1c4b4f4b95174

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded URLs that point to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URLs, reinforcing the malicious intent. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious 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.cc/wix?keyword=alimentos+ricos+en+gluten+pdf
- https://cdn.shopify.com/s/files/1/0440/7204/2661/files/jusanuzatokawa.pdf
- https://cdn.shopify.com/s/files/1/0429/7929/5383/files/girores.pdf
- https://cdn.shopify.com/s/files/1/0429/2945/5271/files/no_mans_sky_recipes.pdf
- https://cdn.shopify.com/s/files/1/0432/6827/6384/files/lanage.pdf
- https://static.usrfiles.com/ugd/b8c837_9f1b9f5a88e84d1e847c33a712fe93b2.pdf
- https://static.usrfiles.com/ugd/b8c837_fe087dee0ac440b78ff6ddd6c68974aa.pdf
- https://static.usrfiles.com/ugd/90423f_a41fa735e1de4a4683e9a6f25b094ac6.pdf
- https://static.usrfiles.com/ugd/c3f59f_ccd4f8cb065e4edaa26c2ab185f24588.pdf
- https://static.usrfiles.com/ugd/1a89c8_215e2e7f0c0341c3acd3c4340ffd772f.pdf
- https://static.usrfiles.com/ugd/ac72e0_17756dcb25034fd88e4e0ed026fd0fdc.pdf
- https://static.usrfiles.com/ugd/3dd68e_10899f7c4f3c454eb03090e1c80e5d60.pdf
- https://static.usrfiles.com/ugd/b8c837_898694c2f8824a628fe9f7a932fa1b0e.pdf
- https://static.usrfiles.com/ugd/b8c837_496e9f9139094dce861f9513f71536a0.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_off0000742f.bin` `1855dcbe145d6299aa6a56cbe8c96ccb6c8aa554f89f97d9b9b3f8e7bc7df2fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x742F	5252 bytes
`font_01_sfnt_off000085fe.bin` `51e7961b6ef1da6c8dc4853f8271d6606430ddc018e6c4416494f13d16183079`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85FE	11524 bytes

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