PDF malware analysis — malicious · 6a4b328e2feff8a9

MALICIOUS

PDF

37.0 KB Created: 2020-09-10 00:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 62858312513a982e5bcb0bd30a11a46a SHA-1: 8f2ea958f23a5eb01663f61b7902f03b1f897108 SHA-256: 6a4b328e2feff8a98bd78a30125e6121922c3f3a7fa44c30a3ebebf867ead0c8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a clear lure related to translation, and the embedded URL points to a known malicious redirector. The document body, though heavily obfuscated, contains the redirector URL and references to other PDFs, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness.

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.link/wix?keyword=traduction+allemand+fran%25C3%25A7ais+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/f0b6b3_d277ff9921884710adb105a4bec3811c.pdf
- https://static.usrfiles.com/ugd/77941b_36191f52267a4133bbc343b0efbbd411.pdf
- https://static.usrfiles.com/ugd/18f527_678ff801beff4f169107639ef57d6801.pdf
- https://static.usrfiles.com/ugd/b8c837_b98d47317cfc464599eaf2a6bba582ff.pdf
- https://static.usrfiles.com/ugd/4b874d_4cb76288f8474cabb7f4a0801cc4b51e.pdf
- https://static.usrfiles.com/ugd/a13bc2_44177f70c67849bda50e2c345273f0c8.pdf
- https://static.usrfiles.com/ugd/2074c9_98876898803343a9badea9339065e934.pdf
- https://cdn.shopify.com/s/files/1/0459/8877/4045/files/hdx_7000_datasheet.pdf
- https://cdn.shopify.com/s/files/1/0429/5606/2876/files/63983335946.pdf
- https://cdn.shopify.com/s/files/1/0450/2857/3334/files/ser_bachiller_enero_2020.pdf
- https://static.usrfiles.com/ugd/bcd086_110e9ef25b3143ffb07b7dfeedfb720c.pdf
- https://static.usrfiles.com/ugd/4cf28d_64b522c71a0b4195965e9033d1e7107c.pdf
- https://static.usrfiles.com/ugd/c4ccc4_adbeac35d74b4fe1803f92fd12cdecb7.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_off00004f84.bin` `1380af5b299604be2c4ca4691110fd0a3f95d0e5d1742ee86ab45c81616cc046`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F84	5432 bytes
`font_01_sfnt_off000061a8.bin` `655ba51fa11b8269783d740f8e9ef7a06a524ddfcf5e2b288c11adf768358d63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A8	11040 bytes

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