PDF malware analysis — malicious · 15576ad49f371127

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 07:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b235f460b50fbe045c6ffc71f6bddb30 SHA-1: eca81165a4ecf8e7329b3c2bc3f70e2ca2cc70e6 SHA-256: 15576ad49f3711271765f8e2ce2fe948ebfae9c14400d23295d9fcb51352cb41

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document's content and structure suggest a link farm designed to drive traffic to malicious sites, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of numerous external links indicates a strong intent to redirect the user to potentially 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.com/wix?keyword=first+aid+step+1+2019+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_026f840908d74eab9d7d60ded1dfcd08.pdf
- https://static.usrfiles.com/ugd/6a7407_02de60e38b89469fab1573353fdbdfe3.pdf
- https://static.usrfiles.com/ugd/54fa57_9964792dfb0745ea9e2a61e62ef2d240.pdf
- https://static.usrfiles.com/ugd/1df9ea_6c84029d7df147c79a785af89fbe5f67.pdf
- https://cdn.shopify.com/s/files/1/0433/0081/4998/files/25717065099.pdf
- https://cdn.shopify.com/s/files/1/0431/9916/8673/files/21355058920.pdf
- https://static.usrfiles.com/ugd/c345b0_177e0e7f654a492d8fa9abe07ffc17f3.pdf
- https://static.usrfiles.com/ugd/1be480_ddb708f8a5be41abb86e942394987524.pdf
- https://static.usrfiles.com/ugd/cec570_86310d40a4ea48d983840c7292bc73fa.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004d47.bin` `d00a5e100b180aa1de5f3425e84f27a20f322f6667b3fa944e102675e0f819a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D47	5440 bytes
`font_01_sfnt_off00005fcd.bin` `9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FCD	2092 bytes
`font_02_sfnt_off0000696e.bin` `6b1ed707749b3dd8a47a7984598f4cc7cdcd35c625237756d602da4754e3f206`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x696E	15016 bytes

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