PDF malware analysis — malicious · a4618c45eb141ee2

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 03:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c8d4c887909cbaed4b43b417c0198e24 SHA-1: 74951b6ae1bd1ce8de135344646ed2f1f1bc4d7a SHA-256: a4618c45eb141ee29dd4056d310c00bac0fe2852ba0fa3cf736f2a43a4a1aa7f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=robert+anton+wilson+cosmic+trigger+2'. Additionally, it features a PDF link farm heuristic, indicating a large number of embedded links, with the first being 'https://static.usrfiles.com/ugd/f65518_ddf0b87a82d14868aba29cc6ff2fb8ff.pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests the document is designed to lure users to malicious websites.

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=robert+anton+wilson+cosmic+trigger+2
- https://static.usrfiles.com/ugd/f65518_ddf0b87a82d14868aba29cc6ff2fb8ff.pdf
- https://static.usrfiles.com/ugd/ace02d_96f35c80705f42bbbd958676f0ed3edc.pdf
- https://static.usrfiles.com/ugd/913720_b994827a7e8f41bb9992fbd4f79256a1.pdf
- https://static.usrfiles.com/ugd/ad2ade_918399ed978b4189995cc8f286c038eb.pdf
- https://cdn.shopify.com/s/files/1/0431/8255/5297/files/general_election_to_lok_sabha_2020_annexure_1_form.pdf
- https://static.usrfiles.com/ugd/b8c837_bb76e93294e649dda410835ba43541f8.pdf
- https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
- https://static.usrfiles.com/ugd/b8c837_9e3b4622226e425fbc95cc7d4cf7127b.pdf
- https://static.usrfiles.com/ugd/b8c837_917d8b2a606b423bbe4aa9011b4cbacb.pdf
- https://static.usrfiles.com/ugd/06497e_902029c002c74e0b8516d3ea315a64c4.pdf
- https://static.usrfiles.com/ugd/67f5f7_f5b446bb31e2442a9fd1d20eb7cc09eb.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_off00005aba.bin` `82d11ddb9639c34df80804f9ccd32da0eec1e5cdeb12f4b74238e7a3d94ab106`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5ABA	5492 bytes
`font_01_sfnt_off00006d61.bin` `754c2e92f06493e5797c19454131ace68189e37e0024406c4ea9049bf8797835`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D61	9904 bytes

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