PDF malware analysis — malicious · 15be9ce63441f6d4

MALICIOUS

PDF

51.1 KB Created: 2020-08-30 03:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 51724242935532ca2b56cd8886aa969a SHA-1: e312b34aa58c7f51349f714a008e92222f530dae SHA-256: 15be9ce63441f6d41eff117c05cfb5b66ab3480e3a6561e8a9cd98642cfb671a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text related to 'alimentation stabilisée variable' and includes the malicious URL, suggesting a lure to a potentially harmful site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of 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.ru/wix?keyword=alimentation+stabilis%25C3%25A9e+variable+0-
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/d1d005_064d2a3580c04e0eb9cf15e86c8bf438.pdf
- https://static.usrfiles.com/ugd/0aab01_8923993787504e13b36b20e32aab68e0.pdf
- https://static.usrfiles.com/ugd/286fb8_905ea05039c34e87a0800a47d2c7ed9e.pdf
- https://static.usrfiles.com/ugd/b8c837_013d51f8434549aa9d242b3c5c66603c.pdf
- https://static.usrfiles.com/ugd/963627_dd5270209d1e48da993d640a90bfc88f.pdf
- https://cdn.shopify.com/s/files/1/0433/7218/3710/files/altium_designer_17_manual.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dofupuz.pdf
- https://cdn.shopify.com/s/files/1/0430/4669/9165/files/16733944741.pdf
- https://cdn.shopify.com/s/files/1/0435/4693/5460/files/83887946661.pdf
- https://cdn.shopify.com/s/files/1/0430/3618/0634/files/33999219739.pdf
- https://cdn.shopify.com/s/files/1/0432/1280/0159/files/catia_basic_tutorial.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.pdf
- https://static.usrfiles.com/ugd/d54300_ffe2d156a432490eae06c02a0384fad7.pdf
- https://static.usrfiles.com/ugd/b8c837_2d89d6439cac4a22ace7d31827e05513.pdf
- https://static.usrfiles.com/ugd/7f16bd_d76bf7514a13417f9f4ea9a34ef99718.pdf
- https://static.usrfiles.com/ugd/e4ff69_bff6d57a58524898b204acf6c57de4c0.pdf
- https://static.usrfiles.com/ugd/b8c837_abcf35407fab42aab17ac4e20d9a7c69.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_off00007563.bin` `0a33f4b44b12b1824feeb2122f186654d12a28eb59109ab3ebb07e1bcc3b3bc9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7563	5336 bytes
`font_01_sfnt_off0000872c.bin` `2d2f259d4daff2c08dc5d2319967ff77eb5c2528f3c65f7a321b231ef4cc153b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x872C	3684 bytes
`font_02_sfnt_off000095e1.bin` `d038f1e35d36314347adc10ccbe6652961560c4f17289e858480351f97c1b6dc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95E1	12164 bytes

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