PDF malware analysis — malicious · 03f7d2c08ff65540

MALICIOUS

PDF

46.7 KB Created: 2020-08-29 02:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1b1c40d2c7417aaef3fc2ea09da843ec SHA-1: bdae8d62d384f722015d92e6c3cd56a8566f845f SHA-256: 03f7d2c08ff655408b73e5325656a760104bd884ecdfaed1f1796afa7aa557e3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=skyrim+companion+mods', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text fragments related to Skyrim mods and the URL itself, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links further indicates a link farm strategy.

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.ru/wix?keyword=skyrim+companion+mods
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/3406/7615/files/fakuwodowi.pdf
- https://cdn.shopify.com/s/files/1/0437/0864/5541/files/vagusobojidewu.pdf
- https://cdn.shopify.com/s/files/1/0428/8829/8662/files/email_sign_in_android.pdf
- https://cdn.shopify.com/s/files/1/0437/1991/7717/files/tomivonalibewobipixuzoro.pdf
- https://cdn.shopify.com/s/files/1/0431/2032/8853/files/toxazipuwuvabumupegajunaw.pdf
- https://cdn.shopify.com/s/files/1/0428/8171/2287/files/badolu.pdf
- https://static.usrfiles.com/ugd/b8c837_39f0641ceebb4678957cccd7fde98296.pdf
- https://static.usrfiles.com/ugd/b8c837_d5254cda8ee940a693c157be1c2482af.pdf
- https://static.usrfiles.com/ugd/b8c837_d515d4ac674e4f35b6ceefdec33cb7d7.pdf
- https://static.usrfiles.com/ugd/b8c837_712dbd5c204d4b4094da27ff0538d1a6.pdf
- https://static.usrfiles.com/ugd/b8c837_6a734cfefba04034afa32b3a9a67140d.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_off00007a00.bin` `2a793ac8c8f3734e37bbf14ed2bab85dd39716a2b85cef0c228f660797d5f466`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A00	5456 bytes
`font_01_sfnt_off00008c75.bin` `8c43a621557ced748b1fc3b58fa77a98448680ab473e187b2bedbf77d402f281`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C75	10044 bytes

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