Malicious PDF — malware analysis report

Static analysis result for SHA-256 332800fea85dfec9…

MALICIOUS

PDF

44.2 KB Created: 2020-08-17 04:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 286054380039fd23b6d58b49bcff192f SHA-1: aeba4e51a9f6f4b99c8a8d2d3643270d465779d5 SHA-256: 332800fea85dfec985b0eab8f756d4048650177c468f383765aae375abbeb9a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: Malicious File

The PDF file contains a malicious redirector link disguised with keywords related to Netflix and Mac computers, aiming to lure users to a malicious site. The ML classifier strongly indicates maliciousness, and the presence of numerous links, including one to a known malicious redirector, supports this. The document body, though heavily obfuscated, contains the malicious URL and other PDF 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.ru/pify?keyword=netflix+movies+to+mac+computer
    • http://vuzopi.marywilliamsfinearts.com/uploads/1/3/0/7/130739693/jamubufatos.pdf
    • http://files.ilovemytemple.com/uploads/1/3/1/3/131384300/lutopunetaxure-kirituwelup.pdf
    • http://files.maladattaphd.com/uploads/1/3/1/3/131380063/nijudejonojadug.pdf
    • http://files.notronmfg.com/uploads/1/3/0/7/130776343/xovumomalufij-rugetovuviza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/free_steam_keys.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/world_series_of_poker_tv_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/95103240597.pdf
    • https://cdn.shopify.com/s/files/1/0440/1093/0341/files/63481691113.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0448/3871/5552/files/gavovitora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/anualidades_anticipadas_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/kuronutotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/gungeon_unfinished_gun.pdf
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/67951593960.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_off00006d16.bin
7845a3050e08af777165195ecee89bc3660767dad1a8a644d6b6912f341b5ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 5260 bytes
font_01_sfnt_off00007ef8.bin
88c63742e4f5f129b2e644ac5a41be2598e6089dc211041dbc4756a1ee12b305		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF8 10804 bytes

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