Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb2874aa3047e62…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 03:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0080bf4bf9b831334690624ba2a9d9b1 SHA-1: 4cc5a335db3a48505fb8ecc6dee073c1d03b94e9 SHA-256: 6bb2874aa3047e6289604d61e732f0df8121144d87bd77e9eefc3d38788f2c16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. This suggests a phishing or scam attempt, likely delivered as an attachment.

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/wix?keyword=brief+applied+calculus
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_b141bc19f86a429baf8c81e42b40d6e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3db128fc619940f7898698c55b1c2cc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/matter_and_interactions_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/juwenonufowipijadedexevap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/23696741387.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/alter_ego_3_plus_b1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0586/files/monografia_sobre_el_alcoholismo_en_bolivia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/7th_grade_math_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/kogonebudafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/pigilobejujufelogowiji.pdf
    • https://static.usrfiles.com/ugd/74a852_bb881e47bfb244f4b5bccd073e4552f9.pdf
    • https://static.usrfiles.com/ugd/6f58fb_aa7176abbbc84aaf8af6ad0828a1af76.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa2cf6b96ada42b1abdcefda0868898e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cea11174dbc44afa9a07ec8658a7a10.pdf
    • https://static.usrfiles.com/ugd/08fe48_b6c2e38c9e9f43eca470ccfeab879895.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054c3.bin
760504e3f62d3ec9e6d5ebde14de6ace3c01fc782f7bb0c4fe26432b5308a16a
pdf-font-stream PDF embedded font (sfnt) at offset 0x54C3 5200 bytes
font_01_sfnt_off00006679.bin
1b740c33f171aa4d5d42e4ccb203b5f21122416149177280de2b15c9fa067561
pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 10184 bytes