PDF malware analysis — malicious · c1a6bfb0f63fb628

MALICIOUS

PDF

36.7 KB Created: 2020-08-31 03:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8d00bf6342c6a6453022ff582e54bef SHA-1: 618116ba1dd9b60e3cd33af516ec0bfe28c2770d SHA-256: c1a6bfb0f63fb62809b965a7500f263d98c30a53f6435ccac7452d63020793b5

150 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, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches this finding. The primary malicious URL is likely used to redirect the user to a site that hosts further malicious content or exploits.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=saints+row+4+t%25C3%25BCrk%25C3%25A7e+yama+sorunu
- https://static.usrfiles.com/ugd/b8c837_23aa52622ae04cd6862ec580406df94f.pdf
- https://static.usrfiles.com/ugd/a771bd_21a360da041c464b99e30c3d75dde084.pdf
- https://static.usrfiles.com/ugd/b8c837_83384829fd414361a6b8c7de3dc7fae0.pdf
- https://static.usrfiles.com/ugd/3be3a7_4b508dbdcd67482e9af975e136e3821b.pdf
- https://static.usrfiles.com/ugd/d162e3_ae7b257a4970408c9d0dffa5bd94e2d5.pdf
- https://cdn.shopify.com/s/files/1/0439/1131/5611/files/keiichi_okabe_nierautomata_original.pdf
- https://cdn.shopify.com/s/files/1/0440/0375/4142/files/dhakad_chhora_movie_mp4.pdf
- https://cdn.shopify.com/s/files/1/0431/6705/6028/files/93621277361.pdf
- https://cdn.shopify.com/s/files/1/0430/7602/6522/files/lepewukujal.pdf
- https://cdn.shopify.com/s/files/1/0428/1748/7011/files/jadawuwidiwufiromakagavif.pdf
- https://cdn.shopify.com/s/files/1/0433/9413/8277/files/49556722836.pdf
- https://static.usrfiles.com/ugd/e73fea_b535ef529b1b4912923a24493da0c891.pdf
- https://static.usrfiles.com/ugd/353d00_21ab7c0254a743bb86e42e2862a1b6ae.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_off000044e1.bin` `51bf15007256df6876dbf9e985bafe1246e1ee06d7dcc2b3a85aef8697e8ae67`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44E1	5552 bytes
`font_01_sfnt_off0000578a.bin` `c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x578A	1796 bytes
`font_02_sfnt_off00006015.bin` `88a3e0b066adb9499f0c6558ae6c4214f2801b826482f1881e20263c84a24fe0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6015	11436 bytes

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