PDF malware analysis — malicious · 07060706b4b85b08

MALICIOUS

PDF

49.5 KB Created: 2020-08-30 02:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e90b20b65e1d2b12e6eb75a3a39324d SHA-1: fd047f28bacb9aa22c2ad27cc529979fe5c7d659 SHA-256: 07060706b4b85b08764d90b8844ac630377672d559cc27b519f51130f7432636

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a lure related to an "Uber tax guide" and embeds a large number of links, including one to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=uber+tax+guide
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
- https://static.usrfiles.com/ugd/3eed2b_52a3f6e458934f6bbd5791377daf2487.pdf
- https://static.usrfiles.com/ugd/0dd040_fe8cdf4e004f41e0b0a5e3727807ec3c.pdf
- https://static.usrfiles.com/ugd/b8c837_da5208c95279464f8ddee75f4edd6cd7.pdf
- https://static.usrfiles.com/ugd/b8c837_c97d650ad7d44f28b86e8513a051f3d3.pdf
- https://static.usrfiles.com/ugd/dc98cc_6bc77c48bc944827a110db8dcc991f8a.pdf
- https://static.usrfiles.com/ugd/b8c837_d9df642da5774e1194a80f0934fb8a8b.pdf
- https://static.usrfiles.com/ugd/b8c837_175eddbbee2643abaa28acc967ce3714.pdf
- https://static.usrfiles.com/ugd/b8c837_e8ade5e9a72a46d2a013f43be6f77b37.pdf
- https://static.usrfiles.com/ugd/61b8bf_f99d2a5102904f638837dce9baad42c3.pdf
- https://static.usrfiles.com/ugd/b8c837_070ce2bf6836403db4bed0a752beced0.pdf
- https://static.usrfiles.com/ugd/8de238_c6fa9a7ae4cd4ec883addfb181493a08.pdf
- https://static.usrfiles.com/ugd/b8c837_a656143f4a0e461e9222c9593b639648.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_off000083ef.bin` `22e3a14ea2aace57bde477b50bc8775409b2e5eb52759015c70de3890ce8c895`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83EF	4984 bytes
`font_01_sfnt_off000094f0.bin` `7302934efd46287da1361eb629630ce549f9ab92434c9ad90bb55a9b0c3717cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94F0	11056 bytes

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