Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ef1ee3e4808739…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 11:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1de1f773f1f658020a72c1f957f44af SHA-1: 162444d8a6ee21eb35fc4416452f15330f6eb27e SHA-256: d8ef1ee3e4808739bae0f9f86d0c3c9745f4f8c792cf43052589a3cbc48d442d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, a technique often used for SEO manipulation or to distribute malicious content. One of these links, https://ttraff.ru/wb?keyword=pomodoro%20technique%20pdf, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=pomodoro%20technique%20pdf
    • http://files.newhopeohio.net/uploads/1/3/1/3/131381103/cf274db.pdf
    • http://files.mackaychocolatebouquets.com.au/uploads/1/3/1/6/131636916/lekedona-nemufikibusuka-bodujufopomi-tusisuve.pdf
    • http://kinetaru.internationalhrnetwork.org/uploads/1/3/1/0/131070487/6608165.pdf
    • https://cdn.shopify.com/s/files/1/0432/5415/3371/files/83171367989.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/the_cask_of_amontillado_by_edgar_allan_poe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/10466236737.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/96997367981.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/62565429574.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/35346558955.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2715/files/catalog_cp_in_cadivi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/3d_animation_making_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/tixafiwiriza.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.

FilenameKindSourceSize
font_00_sfnt_off00005b1a.bin
f9d40f5c57f38eb3f0bd57509d900baca64b6d6f2e4426c8e1b11a4dd5aafb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1A 5104 bytes
font_01_sfnt_off00006c51.bin
761ef02306d9188c068ca0959ea92eb33ea961e6fc0c89a52f24d4dbef3bd16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C51 10348 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.