PDF malware analysis — malicious · 131b7efe801ddca5

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 05:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 86a75449b81d20cd1c4ea04a267043b6 SHA-1: 75ff2bdd83dda7540b863a66ba1044cfc5c63433 SHA-256: 131b7efe801ddca5b9363dcc69d95ac47a2fd40db3aead2562b6d23bd5f8e67a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the malicious URL and references to templates, suggesting a lure for phishing or malware distribution.

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/pify?keyword=7+point+likert+scale+template
- http://files.yukimuli.com/uploads/1/3/1/6/131636941/papedaxez.pdf
- http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0437/3469/6097/files/nijegaletepimodotoma.pdf
- https://cdn.shopify.com/s/files/1/0427/4785/5004/files/86376045090.pdf
- https://cdn.shopify.com/s/files/1/0430/0124/9955/files/american_accent_training_pronunciation.pdf
- https://cdn.shopify.com/s/files/1/0429/2942/2499/files/lagu_lily_cover.pdf
- https://cdn.shopify.com/s/files/1/0437/2132/6742/files/85369088866.pdf
- https://cdn.shopify.com/s/files/1/0430/7533/8389/files/airtel_tv_exe_for_pc.pdf
- https://cdn.shopify.com/s/files/1/0431/6731/8167/files/ace_academy_gate_books.pdf
- https://cdn.shopify.com/s/files/1/0434/7995/7669/files/62480426588.pdf
- https://cdn.shopify.com/s/files/1/0432/3311/6315/files/2652489172.pdf
- https://cdn.shopify.com/s/files/1/0427/8625/9100/files/sarixu.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_off00006003.bin` `b30c3fadaa84d19effef3dba06e5d5144d880ab4e9d171e237287731616a6d43`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6003	5128 bytes
`font_01_sfnt_off00007154.bin` `85c8258dcf37bf789bc86ba353174ae3b9c11b17b748a236bb0e3d9ec139cd0e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7154	9620 bytes

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