PDF malware analysis — malicious · 6d051d8c9dc7a03d

MALICIOUS

PDF

61.3 KB Created: 2020-08-15 05:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a9c861a42509f41fa689793c855ed3e8 SHA-1: 0c543182b025c1fcf5e3050bf1d47749c3c7481b SHA-256: 6d051d8c9dc7a03dcd04e443613b19f77a67b86e6c560d7616f79120bff4fa79

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract search engine traffic and lead users to malicious sites. The ML classifier strongly indicates malicious intent.

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/pify?keyword=facial+expression+pictures+pdf
- http://files.makinghairsmile.com/uploads/1/3/1/3/131381067/97dcca.pdf
- http://files.sirratleather.com/uploads/1/3/0/8/130814926/werulilasewe.pdf
- http://files.lebanonstingerswrestling.com/uploads/1/3/1/8/131872055/9538793.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0436/5965/7374/files/93657195714.pdf
- https://cdn.shopify.com/s/files/1/0429/2745/6419/files/mawufolovukizaw.pdf
- https://cdn.shopify.com/s/files/1/0439/5070/2750/files/jipoxogix.pdf
- https://cdn.shopify.com/s/files/1/0429/6137/1290/files/pamak.pdf
- https://cdn.shopify.com/s/files/1/0434/3506/5505/files/tanatologia_libros_gratis.pdf
- https://cdn.shopify.com/s/files/1/0434/8903/4402/files/multiple_alleles_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0430/6904/6935/files/hansel_and_gretel_2013.pdf
- https://cdn.shopify.com/s/files/1/0429/0733/6867/files/telkom_catalogue_august_2020.pdf
- https://cdn.shopify.com/s/files/1/0432/3000/3367/files/luwomipe.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_off0000b2cf.bin` `1374cc58cab198aac3c3311236e97441005f08d7eed722806fe740ed639c3ffa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2CF	5172 bytes
`font_01_sfnt_off0000c473.bin` `6516abec13d7a1633ffda3526e44b18c6eef3383aab18a88056f1a3c2f23914b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC473	10628 bytes

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