PDF malware analysis — malicious · 6829562a0759cb05

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 04:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 50f95f0f485a86e57a83e75a288b59f9 SHA-1: 6146c8b5cc1f9489c8174027f36635d44326fb6b SHA-256: 6829562a0759cb0503fe99b0387022142610d59e68f7ed653d02d6a3fe500be1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. It also exhibits characteristics of a link farm, embedding numerous external PDF links. The document body, though malformed, contains the malicious URL and appears to be a lure to generate traffic to the redirector.

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=a+single+plantwide+overhead+rate+method+is+very+expensive+to+apply
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/cbdbb6_26e976eaefc0453f9443271fb2e02a3e.pdf
- https://static.usrfiles.com/ugd/b8c837_940384b7959d48c39fa2658203273150.pdf
- https://static.usrfiles.com/ugd/6924eb_2ec1a516a9384752bb7437f92191e389.pdf
- https://static.usrfiles.com/ugd/b8c837_59fa1813d14a48b384a6d51b8831d1e2.pdf
- https://static.usrfiles.com/ugd/a44510_f5b0cb8c85c745bc9b9111df3428be29.pdf
- https://cdn.shopify.com/s/files/1/0431/7547/7407/files/bhojpuri_album_video_song_full_hd.pdf
- https://static.usrfiles.com/ugd/b5aed9_1526ab50debf4c52a657da9c28bf57dd.pdf
- https://static.usrfiles.com/ugd/b8c837_58a5cd592390491e80ecaffb9388e4cf.pdf
- https://static.usrfiles.com/ugd/2b25b5_e2176ecd61dd4e7ca8fbe0bf3d75eb5e.pdf
- https://static.usrfiles.com/ugd/b8c837_a47a680e4ec94322a405f54667ff81ba.pdf
- https://static.usrfiles.com/ugd/12dc78_5d9f72b4ca4f45b2875b8968ad4f3927.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_off00005c87.bin` `ff7c577d3b0c6469a228d3b1429b05ff89cc555f06d9fe8934d1d695b1ec0136`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C87	5684 bytes
`font_01_sfnt_off00006fcb.bin` `721d0946bb0d62ff80fdc8dbb5d6c7d3ff777775948708dc52f6e878fb894897`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FCB	10124 bytes

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