PDF malware analysis — malicious · ae7e04bff296bcd1

MALICIOUS

PDF

42.5 KB Created: 2020-09-01 04:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1e031e0695612507582a798d017bfcb0 SHA-1: 79a7c95bc66fb58f2fb12af59023076709fd868b SHA-256: ae7e04bff296bcd18ee5e17a73f7848e3a83aff780886c1cb1ff5e5456c88516

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to its extensive use of external links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the one identified by the heuristic, suggesting a lure related to 'marvel future fight latest apk data'. The presence of numerous links to static.usrfiles.com, even if benign, contributes to the overall link farm characteristic. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious 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=marvel+future+fight+latest+apk+data
- https://static.usrfiles.com/ugd/d2751c_0caf03df413341ef866a8d39a2bbefe0.pdf
- https://static.usrfiles.com/ugd/769f78_ead74e65e1fb42248fe25553d32f3043.pdf
- https://static.usrfiles.com/ugd/b8c837_14e3c7e9331d406da9326c96fd478f5d.pdf
- https://static.usrfiles.com/ugd/b8c837_9825a9fdc3954a0e9e0552a59b86333b.pdf
- https://static.usrfiles.com/ugd/0cd019_ab43510132df49fdbaf97401b00f6bd8.pdf
- https://static.usrfiles.com/ugd/08fe48_bd3446fb777147e8bbd22676ec7137a8.pdf
- https://static.usrfiles.com/ugd/10b11f_9595b014b4964d788464618e375373a7.pdf
- https://static.usrfiles.com/ugd/f80014_634cc8f7050242eba83e294d1c289438.pdf
- https://static.usrfiles.com/ugd/b8c837_4985129fd57a4576b36b95f300dba106.pdf
- https://static.usrfiles.com/ugd/b8c837_76fc61190625422d836c60101f99e96c.pdf
- https://static.usrfiles.com/ugd/769f78_3595421f3c29479f88d7ddaf17e7a77d.pdf
- https://static.usrfiles.com/ugd/286fb8_5409a02369534dc98a0cbfb2235e7758.pdf
- https://static.usrfiles.com/ugd/b8c837_d4e0950ca95c47c4bbd80cc14a98f104.pdf
- https://static.usrfiles.com/ugd/f4de5e_220c8959147b484680f17fe446ad2e8d.pdf
- https://static.usrfiles.com/ugd/3f0e57_6aa8b829a3a94e1e85f45df1f74651cc.pdf
- https://static.usrfiles.com/ugd/0d002d_90a718a0c490435caf492508536e6099.pdf
- https://static.usrfiles.com/ugd/c20ea7_17569d060e284f63895e26b41a1fd37b.pdf
- https://static.usrfiles.com/ugd/cb2bed_37170671285f4f03bd607279209a7f86.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_off0000679e.bin` `88cdf42624cf6184ad3e3e861cdd877c05205038565e7b4dfe7020990440f74b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x679E	5432 bytes
`font_01_sfnt_off00007a28.bin` `b76ccb9ef57849f99e92373c0c86f7bc7d4ba75f15e4591dc10166bd99fb1b5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A28	10128 bytes

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