PDF malware analysis — malicious · 8f94496f3c52c8c5

MALICIOUS

PDF

39.9 KB Created: 2020-08-29 02:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 094d3c79127cba37c8b6324db90794bb SHA-1: 710b71af67cbe98396a3236831e5bb2f1e681d0c SHA-256: 8f94496f3c52c8c5dd235e6501edf1879ff6d5139d893c0f713618a416d15c3c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other benign-looking URLs hosted on Shopify, suggesting a lure to a malicious site disguised as a benign document. The ML classifier strongly supports the malicious verdict.

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.com/wix?keyword=have+you+filled+a+bucket+today+nz
- https://cdn.shopify.com/s/files/1/0429/5501/4298/files/wowabazajoxerubam.pdf
- https://cdn.shopify.com/s/files/1/0435/7593/5134/files/20763932149.pdf
- https://cdn.shopify.com/s/files/1/0437/0163/3177/files/dotumojevilubokeg.pdf
- https://static.usrfiles.com/ugd/b8c837_1cb4107600054da8b5f169b8a7abdea4.pdf
- https://static.usrfiles.com/ugd/b8c837_b5a9a028e0b644cd8d98e93a5652333a.pdf
- https://cdn.shopify.com/s/files/1/0430/7704/2325/files/gunojibozurolevur.pdf
- https://cdn.shopify.com/s/files/1/0430/5007/4269/files/kubota_quick_hitch.pdf
- https://cdn.shopify.com/s/files/1/0430/7514/1794/files/51027108163.pdf
- https://static.usrfiles.com/ugd/b8c837_93ba3da61f764956aa760ba5357b868c.pdf
- https://static.usrfiles.com/ugd/b8c837_fa3f79f315344e1b9542d8b04c15f966.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_off00004be0.bin` `b108e51734c7038ad531fc9d3c17f3a8bcdec2f181fcb53e1ede21340333c0b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4BE0	5120 bytes
`font_01_sfnt_off00005d6b.bin` `e377eeb67b82367040cef8db5787701e8bd22ece57c29ff2b91b60fc48d8a403`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D6B	7004 bytes
`font_02_sfnt_off00006ff1.bin` `6e2d4d9a85581a1932199f7924e825bc04a39f576c58dbcc9c379d16bf88c071`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FF1	10188 bytes

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