PDF malware analysis — malicious · 0a5a2279e7358312

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 19:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d1a7b8e16f63e42f494f720f6c849a00 SHA-1: 004417487c03a0a0c9f1895daee435d9c7798bda SHA-256: 0a5a2279e73583121dea0ab8637a154be4cd38cf31b995f04836c87934933bbd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to lure users to malicious sites for further compromise.

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=lotro+wisdom+deeds
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/4296/3613/files/32513003322.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
- https://cdn.shopify.com/s/files/1/0431/4716/5850/files/formal_dress_code_guidelines.pdf
- https://cdn.shopify.com/s/files/1/0428/9495/0556/files/60897700198.pdf
- https://cdn.shopify.com/s/files/1/0438/2579/1138/files/assembly_rowdy_movie_audio_songs_free.pdf
- https://static.usrfiles.com/ugd/b91566_53c2a449c09f470ebd388076a8176fea.pdf
- https://static.usrfiles.com/ugd/b8c837_70397251cb4b4e688b91709fcbc6f7f5.pdf
- https://static.usrfiles.com/ugd/3bca44_2910015139414412ac11464ea27183d4.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
- https://cdn.shopify.com/s/files/1/0438/3683/3954/files/walanifut.pdf
- https://cdn.shopify.com/s/files/1/0431/9579/3568/files/archaic_dictionary.pdf
- https://cdn.shopify.com/s/files/1/0430/8857/6665/files/38426851557.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_off000077fa.bin` `8bdcb1c97d750a1b21479b161c67e52dc04cf9ea2340b9c87b7e1985a40e319e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77FA	4760 bytes
`font_01_sfnt_off00008828.bin` `cf99899ee002a7b5327bf2d66213f4b52765311cc6c2ddd6e7066536f9c77731`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8828	10744 bytes

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