PDF malware analysis — malicious · e923b99d7be6f962

MALICIOUS

PDF

35.2 KB Created: 2020-11-03 05:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 04b1977e5baa76a2178fb5cb336d003c SHA-1: 1e51ebec0a9188c3b22736ac8c85b52a6a4b21f9 SHA-256: e923b99d7be6f962218d91acbb489c06908f9f4e55fd13a442a12a5137b916f7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body text, though partially obfuscated, contains a URL that appears to be a lure. The presence of a large number of external links suggests a link farm or SEO poisoning attempt, aiming to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/123?keyword=mugen+1.1+stages+1280x720+ace+million
- https://cdn-cms.f-static.net/uploads/4385869/normal_5f9c647a8e388.pdf
- https://cdn-cms.f-static.net/uploads/4387716/normal_5fa026ca5f610.pdf
- https://sukevimekixav.weebly.com/uploads/1/3/4/5/134599702/7365823.pdf
- https://cdn-cms.f-static.net/uploads/4388814/normal_5f919ff2b517a.pdf
- https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/xidado.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/d05ecac7-6e4b-4a8a-bf08-d379c7c1a44c/lease_extension_addendum.pdf
- https://cdn.shopify.com/s/files/1/0268/7572/3947/files/53409423325.pdf
- https://cdn.shopify.com/s/files/1/0499/3541/7502/files/best_manual_suv.pdf
- https://s3.amazonaws.com/dapekufoxiraku/east_clinton_high_school_sabina.pdf
- https://cdn.shopify.com/s/files/1/0501/2425/9485/files/the_gospels_power_and_message.pdf
- https://cdn.shopify.com/s/files/1/0498/1089/9099/files/common_sense_apush_quizlet.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_off00004904.bin` `34a9fe6a193cbf650fa03b42ad8e9ddb651b9bf4ba0b2acc9b34f59c969d475c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4904	5728 bytes
`font_01_sfnt_off00005ca1.bin` `f0089478b8602b635d13146cce7a8437469fb24a2df835d09029283080d344ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CA1	10472 bytes

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