PDF malware analysis — malicious · 679f7781095c1eb3

MALICIOUS

PDF

42.5 KB Created: 2020-09-01 03:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7ea1a7e6c909267e36970372ea4f21e SHA-1: fcc0a41adbb64772d8de7df3ff06b34abf662ce3 SHA-256: 679f7781095c1eb331b61e8af0b5fbcd1e8d7abb727fe46fd260881fb12f3034

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one pointing to a known malicious redirector and others to a large collection of PDFs. This suggests an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated 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.com/wix?keyword=form+of+r%2526+b+music
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/93c935_5f4d27f1e99a4513a7092793a9289478.pdf
- https://static.usrfiles.com/ugd/9e53d4_cd1bd3f3fd8a44eeb864f5aaf9393b56.pdf
- https://static.usrfiles.com/ugd/f46427_b1ef1b55cf504a7c80bf3db66f5d5e70.pdf
- https://static.usrfiles.com/ugd/c1615c_7610fa7b9a5a469a9bd1aab3f713d57d.pdf
- https://static.usrfiles.com/ugd/b8c837_7a9a48cdaf0d4a12b9854da07d65e756.pdf
- https://static.usrfiles.com/ugd/8b49c6_f16cc07fb7dd45b1afca261403c8138d.pdf
- https://static.usrfiles.com/ugd/5af86b_e6047b23abb743a3ae696c60ad5113d4.pdf
- https://static.usrfiles.com/ugd/a18aa6_ddb37f795e1342d7a9ff2c47e2582a3f.pdf
- https://static.usrfiles.com/ugd/b916f4_9adfe6ce4573485ab38d125b5e25821b.pdf
- https://static.usrfiles.com/ugd/b8c837_794720be077449388cd86d87b8f395c3.pdf
- https://static.usrfiles.com/ugd/b8c837_df087bd10e5f419e8aa4f439edae7421.pdf
- https://cdn.shopify.com/s/files/1/0430/1357/0709/files/5108626571.pdf
- https://cdn.shopify.com/s/files/1/0429/1624/9767/files/valativazobekaw.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_off00006652.bin` `629eaebb3cae8418897975160ac561028d5f0a11714b08d7e8f0422849530e93`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6652	4448 bytes
`font_01_sfnt_off00007563.bin` `f47a3d995b0ff92d4af471eba579086e2d97d6b4f1ffefd4b4425901d8072f64`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7563	12652 bytes

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