PDF malware analysis — malicious · ede2932f129b268b

MALICIOUS

PDF

60.2 KB Created: 2020-08-21 23:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 27366d1c3691dca12537b6848040a386 SHA-1: 8d7dee238681d604f7b6dcf574d2975317bb3617 SHA-256: ede2932f129b268bb1defabcc841e3bcc3d465605093d5c4aa2105bb5944dc17

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the URL https://ttraff.ru/pify?keyword=discrete+wavelet+transforms+theory+and+applications leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=discrete+wavelet+transforms+theory+and+applications
- http://wowimob.mtsoprisrecriders.com/uploads/1/3/0/7/130738850/8670220.pdf
- http://files.maghknog.com/uploads/1/3/0/7/130775520/8349013.pdf
- https://cdn.shopify.com/s/files/1/0429/3859/7539/files/35919252854.pdf
- https://cdn.shopify.com/s/files/1/0449/1057/5771/files/que_es_ansiedad_generalizada.pdf
- https://cdn.shopify.com/s/files/1/0429/4826/4089/files/zodid.pdf
- https://cdn.shopify.com/s/files/1/0430/6858/8194/files/60960776110.pdf
- https://cdn.shopify.com/s/files/1/0439/1626/3592/files/coward_crossword_answer.pdf
- https://cdn.shopify.com/s/files/1/0428/5349/9046/files/musuvufid.pdf
- https://cdn.shopify.com/s/files/1/0433/5026/1915/files/larson_calculus_10th_edition.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008cb4.bin` `8bc586ea24d0f33e9c8ccfe42567f945d1e28db6d4ea942113c8b0fba3d10d13`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CB4	5648 bytes
`font_01_sfnt_off00009fd3.bin` `096b21a9e35552ed3ae2a53e461e8d462e10263d8cf16adf7da356c5ba9d038b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9FD3	14700 bytes
`font_02_sfnt_off0000ce5e.bin` `e7820fc51e823c9510b69cd30def3c6041c113b552710f50053ecd1ea592d451`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE5E	16224 bytes

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