PDF malware analysis — malicious · 0a58f804d40dee92

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 20:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 90bc622339bab6ad645efdda734e4724 SHA-1: 68f52296968bcd45b57cf0c5d9aef757e4232f31 SHA-256: 0a58f804d40dee926f1b4854a7b192655c75babc460e3e9152acda76e755990a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that point to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The heuristic firings indicate the PDF is designed as a link farm, likely to obscure the malicious destination or for SEO manipulation to attract victims. The document body, though partially corrupted, contains text related to a 'yardage book' and the malicious URL, reinforcing the phishing pretext.

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=bandon+dunes+yardage+book
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/191a6d_45bd69751c8a4b53ab2f40096865a0e7.pdf
- https://static.usrfiles.com/ugd/5bb01c_57d81aa85a564caeb7b66cebbd3cf7db.pdf
- https://static.usrfiles.com/ugd/b8c837_ec86922705b3465d918955a86c9d42d7.pdf
- https://static.usrfiles.com/ugd/f80014_c37959af116d45b083c53769b36b94cb.pdf
- https://cdn.shopify.com/s/files/1/0457/4088/4124/files/tusobozimaworepova.pdf
- https://cdn.shopify.com/s/files/1/0434/4256/9382/files/91621634516.pdf
- https://cdn.shopify.com/s/files/1/0437/4672/1946/files/pdf_editor_pages_online.pdf
- https://cdn.shopify.com/s/files/1/0434/0390/3127/files/20588346452.pdf
- https://cdn.shopify.com/s/files/1/0427/6027/4087/files/56417244181.pdf
- https://cdn.shopify.com/s/files/1/0429/8627/4967/files/nobuneve.pdf
- https://cdn.shopify.com/s/files/1/0437/0428/7383/files/wigopor.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_off00005f84.bin` `90d806ecdd4c799db61534ce9e6ad41f0ca57ea6a32bf7404afb07021270e1ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F84	5316 bytes
`font_01_sfnt_off000071a7.bin` `179df2edef931761f8d5f0ad40e412108526dd72033624726a65b40ace2c4779`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71A7	9840 bytes

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