PDF malware analysis — malicious · b7a97c42373c3025

MALICIOUS

PDF

56.4 KB Created: 2020-08-31 02:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3198e6f3ec0ff8dbb9c60016b56c74de SHA-1: 82a57d86eba9cfb1a9f1b49db37f50e66a804dd3 SHA-256: b7a97c42373c30258506bea95103047ccac08b385a072c448d75ca779690920b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains multiple embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, includes text related to 'informed consent meaning in kannada' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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=informed+consent+meaning+in+kannada
- https://cdn.shopify.com/s/files/1/0432/1932/0992/files/git_pull_changes_from_another_branch.pdf
- https://cdn.shopify.com/s/files/1/0437/9069/6597/files/musex.pdf
- https://cdn.shopify.com/s/files/1/0432/9593/2574/files/xuburukipomevejifo.pdf
- https://cdn.shopify.com/s/files/1/0437/3089/4999/files/sidof.pdf
- https://cdn.shopify.com/s/files/1/0447/1295/1961/files/hermitage_museum_guide.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18491093394.pdf
- https://cdn.shopify.com/s/files/1/0430/6052/7265/files/color_guessing_game_javascript.pdf
- https://cdn.shopify.com/s/files/1/0435/4038/1855/files/jujulamukeribebinek.pdf
- https://cdn.shopify.com/s/files/1/0436/9563/6633/files/17546244238.pdf
- https://cdn.shopify.com/s/files/1/0435/8068/6497/files/lipad.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000074f7.bin` `074e3708a102a3c03ada7cf22939293dd4fade5fdb5b6b212bc2d3101e7e932c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x74F7	24420 bytes
`font_00_sfnt_off00006301.bin` `3fe95b53f7f170704b916b1ef27baaf17af0cf9022002c2a7aa39d9aaa5b5250`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6301	5308 bytes
`font_02_sfnt_off0000a650.bin` `99b272c7fedcb104898df5041146d2f9581df0c380ffbb84915404c3840bef21`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA650	13976 bytes

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