PDF malware analysis — malicious · 8e336c5434ebac79

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 21:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2640d8d176a49876ba221a5e6d3460c1 SHA-1: fcd537f454b7dd6b9825e13dba8dd2254b45c4d3 SHA-256: 8e336c5434ebac79a7191620f0fb52a6d02bd3722bc5f819c1edd44f1d35e9e9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure. The presence of numerous other PDF links, many benign, indicates a link farm strategy, likely to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=children+of+the+corn+pdf
- https://static.usrfiles.com/ugd/b8c837_9789c00d347f4b03877ef1bc5c59f908.pdf
- https://static.usrfiles.com/ugd/b8c837_6ddf5f4dfa9344e29153c837d65911be.pdf
- https://static.usrfiles.com/ugd/b8c837_2ef4a914d18b43e38ab06a1d212f65a3.pdf
- https://static.usrfiles.com/ugd/b8c837_1120cf36c456447ea4535e950cd98174.pdf
- https://cdn.shopify.com/s/files/1/0428/4504/4892/files/lidilimulajobetatogaxipaz.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
- https://static.usrfiles.com/ugd/3649d2_a376d75cd78b406a95644e10827508bf.pdf
- https://static.usrfiles.com/ugd/b8c837_36865808e3de48bf84b4df5d9636c6a9.pdf
- https://static.usrfiles.com/ugd/f80014_a8b45261d4644a1085480c58e61a487e.pdf
- https://static.usrfiles.com/ugd/b8c837_58fdfc4a8f1b44278fbdad7c90667232.pdf
- https://static.usrfiles.com/ugd/b8c837_23de9b25a7244af8b20cabae8e05d6d0.pdf
- https://static.usrfiles.com/ugd/b8c837_0e7d1d0853c747a1ad25edcac3ef4490.pdf
- https://static.usrfiles.com/ugd/b8c837_0ad7be5c8a2d49129316fa4099f232aa.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005f9e.bin` `f7939ec88597a4d7a670a820d2186c78be0a4c6593793e0a8b7e089f35c4c763`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F9E	4760 bytes
`font_01_sfnt_off00006fbd.bin` `60681a95e8113426078eb069adfedad98b22197379cd875e4686c352f43cd379`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FBD	10240 bytes

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