Malicious PDF — malware analysis report

Static analysis result for SHA-256 b214fe3d265b5004…

MALICIOUS

PDF

46.9 KB Created: 2020-08-23 18:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 109433d8282a2d288ce21406d03bf1ed SHA-1: 43a479ed6e0753e4a6dd1d62f7f3132ce289783d SHA-256: b214fe3d265b5004d5b584be209757ae3bd6478f07c123f7adf2324d5bb138ac
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to a URL associated with malicious activity. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The primary malicious URL identified is https://ttraff.com/pify?keyword=palladium+rpg+character+sheet, which is presented in a context that appears to be a Palladium RPG character sheet, suggesting a social engineering lure.

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=palladium+rpg+character+sheet
    • http://xuxuwowi.christineomalley.com/uploads/1/3/0/8/130874276/4bcf4f706.pdf
    • http://xunevifup.decoratingwithgrace.com/uploads/1/3/1/0/131070858/9edade8cf.pdf
    • http://kutaxi.empirejeepclub.com/uploads/1/3/0/7/130740178/72a97e7caf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/sirajumagapifiginazo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/zewazadirefejobufazuwus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/49751757449.pdf
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/81957171534.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/friend_can_t_hear_me_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/dokor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/puzipilumejesat.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/bsava_manual_of_canine_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/dabatudarinil.pdf
    • https://cdn.shopify.com/s/files/1/0454/5744/0926/files/argandoa_macroeconomia_avanzada.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/sajaris.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/35774218917.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/naron.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/kamafanitogijixirove.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.

FilenameKindSourceSize
font_00_sfnt_off0000623f.bin
f8bbb5901ffe8f4b6f783c78d257928b3bcfce8bf61a5943d66665ea8759c7fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 5152 bytes
font_01_sfnt_off000073bb.bin
04e497a7a3c26a2cfa1b325d221d3aec453c223ead8a33c7532d1925b28af5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 14396 bytes
font_02_sfnt_off0000a079.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA079 4324 bytes

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