PDF malware analysis — malicious · 97c46556537010ff

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 22:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f1b0186901a01fd705b1ef6533b9f151 SHA-1: f3af1a3d4429558f934fb6c299c6f0ede605816e SHA-256: 97c46556537010ffbe9bc7d536aa2cee805f5f22447b936e976205f915235b83

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=freedom+writers+movie+questions+and'. Another heuristic indicates a PDF link farm, with many links pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to the movie 'Freedom Writers' and the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=freedom+writers+movie+questions+and
- https://static.usrfiles.com/ugd/d9d1f5_5c71d4ae9d02426f9c115e009a708597.pdf
- https://static.usrfiles.com/ugd/b8c837_13ee047d00e046cb88a652344cdcc94e.pdf
- https://static.usrfiles.com/ugd/d55797_c1ce244d373b44b7be1e59e864c1d10a.pdf
- https://static.usrfiles.com/ugd/e73fea_14ee78f0db8746c68a511193287345b8.pdf
- https://cdn.shopify.com/s/files/1/0430/1750/2869/files/72620686488.pdf
- https://cdn.shopify.com/s/files/1/0432/3577/0535/files/read_anne_of_green_gables.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
- https://cdn.shopify.com/s/files/1/0430/1094/9273/files/86502069404.pdf
- https://cdn.shopify.com/s/files/1/0431/2471/9773/files/cochlear_implant_mapping_report.pdf
- https://static.usrfiles.com/ugd/b8c837_7e904775cefb4412b93ad8db286da3b2.pdf
- https://static.usrfiles.com/ugd/67e251_154e590b74f649038637f5cb90d08429.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_off00005e65.bin` `e1e99aa6e30506da8910cd7d26753f007e801c66682a267be3ff338089d56a82`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E65	5172 bytes
`font_01_sfnt_off00006ff8.bin` `a14963f9f477eb474db61d60f9f852ffc9d91b12924c2f705e494c2204d1b011`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FF8	10656 bytes

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