PDF malware analysis — malicious · 0b3b0d8050abc123

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 05:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e6a081077d98d5282daae1d98c02f17e SHA-1: bba1091fd7532c9091ff414f0f33b015c274cc9a SHA-256: 0b3b0d8050abc12316dbddecebfb6d8eeeb1b52356087e53c958e52197e4f765

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.com/wix. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs.

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=cuentos+para+bebes+en+el+vientre+gra
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0435/1646/1211/files/rpsc_steno_syllabus.pdf
- https://cdn.shopify.com/s/files/1/0433/3830/1594/files/o_reilly_java_books_free_download.pdf
- https://cdn.shopify.com/s/files/1/0432/7034/0772/files/tapadewokuvepapikim.pdf
- https://cdn.shopify.com/s/files/1/0430/7556/7770/files/kexaroxozuxuwema.pdf
- https://cdn.shopify.com/s/files/1/0431/4923/0237/files/posunifikavesuso.pdf
- https://cdn.shopify.com/s/files/1/0434/2733/2252/files/duzivagokinuxunaz.pdf
- https://cdn.shopify.com/s/files/1/0436/0978/4482/files/4416445400.pdf
- https://static.usrfiles.com/ugd/3cb679_7bf8c7ea6fb14c45b67960e648fb9dcb.pdf
- https://static.usrfiles.com/ugd/7d21c0_a6f15c94100b45d3b3d84e996f658e69.pdf
- https://static.usrfiles.com/ugd/0aab01_a06299c847bf4996ad2a1def120e9341.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_off00005d76.bin` `9e6feb8bc9f570286bfe72574b4e7bc1dd421fb652d22eac5dd2833faa4dc3c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D76	5092 bytes
`font_01_sfnt_off00006ed4.bin` `ec3d84c4aa6667000d09b785b8a52d4f49a5da33a76919f90a0d50061aacb079`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ED4	10744 bytes

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