Malicious PDF — malware analysis report

Static analysis result for SHA-256 af019e50bb513903…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 05:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca563605643a905377203659ee10ba3 SHA-1: 3c16d185e4e7d7f530f6f2c107ed5a9b88a1cf1a SHA-256: af019e50bb513903c50ec07eeacf6cd38d26231f973a22b0399298aeca275e48
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=ejercicios+de+vectores+1+bachillerat'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, including one at 'https://static.usrfiles.com/ugd/b8c837_2df67ebf33d145a4a7d7626fcc6d1c51.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to external 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.com/wix?keyword=ejercicios+de+vectores+1+bachillerat
    • https://static.usrfiles.com/ugd/b8c837_2df67ebf33d145a4a7d7626fcc6d1c51.pdf
    • https://static.usrfiles.com/ugd/b8c837_47f35fcd6ee5486788267e9a4d4a76c7.pdf
    • https://static.usrfiles.com/ugd/e3ff21_ce6227c1276b4c1baa81694b50768aff.pdf
    • https://static.usrfiles.com/ugd/b8c837_c51e1c9b1d3b42b285be0c176583e626.pdf
    • https://static.usrfiles.com/ugd/4dd980_e5b940e2886748c8908360e15f5daa13.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/54488533941.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/39880218696.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/jedulebumilewetaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/affidavit_of_support_form_i_864a.pdf
    • https://static.usrfiles.com/ugd/7dd30d_924231c2387847eab996c26ee0fdf2f5.pdf
    • https://static.usrfiles.com/ugd/67f5f7_1e79f8e36802432689b475c3ed6d5645.pdf
    • https://static.usrfiles.com/ugd/20d83a_3c66a35b2cc245a0aa5d6ecf44ad3384.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/collection_letter_in_business_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2823/files/sql_server_configuration_manager_missing_reporting_services.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/pasar_cade_simu_a.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_off00006228.bin
9305cb5daf56ddbdf9caf43cfeee732809bc790605ee3449326259786a8ca50f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 5312 bytes
font_01_sfnt_off0000743c.bin
1b406822bd2831ffb72d35ff02675561942e4997de6519b39ec93dd9d9eed62d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 11216 bytes
font_02_sfnt_off000098fe.bin
74a35dcac671789a1952909c7064e8f0092ccf84988030a41650584fa1b75142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FE 16192 bytes

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