PDF malware analysis — malicious · 47d8936aeafc41d0

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 18:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1018940b08bc1fead11c0b8a4627b067 SHA-1: 4299fc209388889a3b28e193c5fae95b4a0748c3 SHA-256: 47d8936aeafc41d041039d668be685dae7ded6ee2fe1fd42dbce0fb953acbcea

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and contains a link farm of 24 PDF files. One of these links, https://ttraff.cc/wix?keyword=steins+gate+0+vn, points to known malicious redirector infrastructure. The document body contains obfuscated text and URLs, further indicating a malicious intent to redirect users to harmful content.

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=steins+gate+0+vn
- https://cdn.shopify.com/s/files/1/0440/7400/8726/files/dancer_in_the_dark_torrent.pdf
- https://cdn.shopify.com/s/files/1/0431/0020/9319/files/96388005600.pdf
- https://cdn.shopify.com/s/files/1/0438/8644/4696/files/why_do_toenails_fall_off.pdf
- https://cdn.shopify.com/s/files/1/0437/0307/4984/files/les_vetements_activites.pdf
- https://static.usrfiles.com/ugd/9e41f0_352d376a33434119a027e064c5fc8833.pdf
- https://cdn.shopify.com/s/files/1/0434/2703/7336/files/aether_raids_guide_feh.pdf
- https://cdn.shopify.com/s/files/1/0431/7092/2655/files/vataboretegifubuxowulagij.pdf
- https://cdn.shopify.com/s/files/1/0427/6905/5911/files/viliworadoveruwopovubur.pdf
- https://cdn.shopify.com/s/files/1/0431/6577/8080/files/38601254827.pdf
- https://cdn.shopify.com/s/files/1/0429/8450/5498/files/1608281139.pdf
- https://static.usrfiles.com/ugd/e5a943_a5833cd2645040139d2f5530533557ec.pdf
- https://static.usrfiles.com/ugd/b8c837_172efa5ee21f4ac49c4e42bfffa82872.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_off00006a33.bin` `317cdb70d929c9d253636a758c659390b1a73d9b5f2d7dbd08428f07b5113d94`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A33	5028 bytes
`font_01_sfnt_off00007b64.bin` `f8dbb7941bc6add9e6ed3ccc131778b020e4a14e58d60139d1eb77db18a2385d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B64	10040 bytes

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