Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc70716d80ed588…

MALICIOUS

PDF

39.2 KB Created: 2020-08-14 20:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f48b2c94018e51b63ee67be0b9bd95 SHA-1: f565072a6a2277afa744025f827d183d5e01e159 SHA-256: 2dc70716d80ed588923480267cf65755dc94dc7b2b3bb2d984b55915d39b1c08
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'parallel lines worksheet algebra 1' and a URL that matches the redirector. This suggests a social engineering attack aiming to redirect users to 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.cc/pify?keyword=parallel+lines+worksheet+algebra+1
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/58489351210.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/11525596483.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/juzalixawuzejezusotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/jimogenuranelo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/history_of_taj_mahal_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/titufafimimidofefiwofane.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/cadaver_exquisito_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/91085877335.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/intro_to_the_design_and_analysis_of_algorithms_levitin.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/27771188635.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_off00005971.bin
b78b868acd2c2e69dc6387c22bf6b02a908fbffc839fb4466bf585bcf2c19ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5971 5296 bytes
font_01_sfnt_off00006b84.bin
81f609dbbe856dc79e9a423e43fa47b4cdab503fd574b61eb3e1189fc69cd292		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B84 10856 bytes

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