PDF malware analysis — malicious · cda1fcea998e96e9

MALICIOUS

PDF

40.3 KB Created: 2020-09-03 10:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fd00b042cae5ba5be853b5009a739249 SHA-1: 5db480cff935c061473202510d0fde5379ea54b6 SHA-256: cda1fcea998e96e95a1fac01018f6ab3cc797a4685054cf6c857e91c510abc6c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that lead to a known malicious redirector, disguised as a free wallpaper download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of the URL in the document body strongly indicate a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, limiting the analysis of further stages.

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.ru/wix?keyword=desktop+wallpaper+1920x1080+free
- https://static.usrfiles.com/ugd/f84671_4f49dd7b6a2b4853ac2c8e491bf5406d.pdf
- https://static.usrfiles.com/ugd/764aaa_91a4f9f099a544109604e7c7366ed438.pdf
- https://static.usrfiles.com/ugd/b8c837_2fd0a6254a624316afc839a0cfb07ffb.pdf
- https://static.usrfiles.com/ugd/a86d68_6fe2749e2b3143988d57c60d2c2ef3a7.pdf
- https://cdn.shopify.com/s/files/1/0450/3240/7198/files/apocalpticos_integrados.pdf
- https://cdn.shopify.com/s/files/1/0432/4130/8320/files/57352894382.pdf
- https://cdn.shopify.com/s/files/1/0435/0997/3147/files/44698478394.pdf
- https://cdn.shopify.com/s/files/1/0430/7186/4993/files/57003577382.pdf
- https://cdn.shopify.com/s/files/1/0434/8513/5014/files/kopiwasuburor.pdf
- https://cdn.shopify.com/s/files/1/0438/1910/6466/files/18564716765.pdf
- https://cdn.shopify.com/s/files/1/0431/2553/8980/files/75165569568.pdf
- https://cdn.shopify.com/s/files/1/0428/9419/6902/files/xoruzozolesoxupume.pdf
- https://cdn.shopify.com/s/files/1/0439/0964/4456/files/how_to_install_autocad_map_3d_2020.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005e9a.bin` `c7a75e646c9c47ee0eb518c500f74cdf30115a333157287c6fa1afc951e37f07`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E9A	5796 bytes
`font_01_sfnt_off00007282.bin` `38747d7e2f4ea34a05840085b5fc038424a6b31c84730b58609e6742e15c3177`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7282	10056 bytes

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