PDF malware analysis — malicious · 895932082704d9f3

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 08:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8a43686c3ec672d1cffdfc03257f9f35 SHA-1: 663a1c2f5932f416eebf6414f6e3a7ca49006013 SHA-256: 895932082704d9f3645e247c4ba87360f0960d34e21a7eb194944b6aa3e6fb75

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily corrupted, contains the URL https://ttraff.cc/wix?keyword=diodo+zener+valores, which is likely the intended destination for the user. This suggests a phishing or redirection attack.

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.cc/wix?keyword=diodo+zener+valores
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/0dd040_f13e158a6c5748448481ad7a80c6d72b.pdf
- https://static.usrfiles.com/ugd/f967ac_fe945e3edece4e9dab225347046ead7e.pdf
- https://static.usrfiles.com/ugd/857e61_108a1ff0e17a4d7dbc8b91fd71c99ddf.pdf
- https://static.usrfiles.com/ugd/ade4e6_f8431aae16cb41719f1d55dfff8a576f.pdf
- https://cdn.shopify.com/s/files/1/0429/2280/3366/files/rosilanawaluwes.pdf
- https://static.usrfiles.com/ugd/3b47cb_eba3418075d14de5aa94a23343aab981.pdf
- https://static.usrfiles.com/ugd/93c935_c607d8ce5f8249b3863166ef6b8509f6.pdf
- https://static.usrfiles.com/ugd/191a6d_e4aa26e3dc684756937106099d1dab6a.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
- https://cdn.shopify.com/s/files/1/0437/1762/3957/files/backupbuddy_wordpress_plugin_free.pdf
- https://cdn.shopify.com/s/files/1/0431/5509/5712/files/nonalemop.pdf
- https://cdn.shopify.com/s/files/1/0432/7689/4372/files/16269126119.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_off00005d1d.bin` `df27d9e1935f53677280328dcb8af02c4fa5a66ca66775614ebe51918e9da653`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D1D	4928 bytes
`font_01_sfnt_off00006df3.bin` `3ee3f53e41a50cf72a0b1edadd8d24c56ca5d0816e4288efed50b08199ff5763`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DF3	15120 bytes

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