PDF malware analysis — malicious · 2bdd98f3cd7f328c

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 00:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2f6b943c40abff3c5decd9cb3ae5c463 SHA-1: 5ea79573cbc02afca1754f2f152a056c23f50124 SHA-256: 2bdd98f3cd7f328cc0c0f4978b4ffeb3643748e1fe19b229b4623827477383f0

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to 'ttraff.com', identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=art+through+the+ages+15th+edition', suggesting a lure related to an academic publication to entice clicks on malicious links.

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=art+through+the+ages+15th+edition
- https://cdn.shopify.com/s/files/1/0434/6049/3474/files/continent_practice_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0460/7134/9412/files/22812601922.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdf
- https://cdn.shopify.com/s/files/1/0433/9613/7111/files/12929456576.pdf
- https://static.usrfiles.com/ugd/e3834b_24b52a0f642f497d941190ef2c5b68d0.pdf
- https://static.usrfiles.com/ugd/b8c837_281e734dd9934f03bbd40e4afd39e7fb.pdf
- https://static.usrfiles.com/ugd/4d6844_ba7414eb423c471a83e889312aa76678.pdf
- https://cdn.shopify.com/s/files/1/0428/7810/7811/files/ncert_biology_class_11_solutions.pdf
- https://cdn.shopify.com/s/files/1/0431/2131/1898/files/mosekab.pdf
- https://cdn.shopify.com/s/files/1/0430/9958/6714/files/6036893327.pdf
- https://static.usrfiles.com/ugd/a838c0_cc59a50ad6124cd2ae609f001b8bfbf0.pdf
- https://static.usrfiles.com/ugd/a44510_11d84ab6547040dda1ee676f19f92710.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_off0000559e.bin` `f62afb4c74e561c4481299598464e8ef6eabf69099dfd97fe786d51f44bf9778`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x559E	5220 bytes
`font_01_sfnt_off00006765.bin` `1bdd50028233ba434fa390a01f5494deaa7d54e48676aff951a4a0aa2eba88fa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6765	10620 bytes

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