Malicious PDF — malware analysis report

Static analysis result for SHA-256 815266b9ee104b7d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 22:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25976af9048519c629e833f36c1eefa5 SHA-1: ba4a3bf7ba10b1b16fcd05ee30e22b8e1b9bd153 SHA-256: 815266b9ee104b7dd793f5c90cc8cc9a35499c10eddaada10339085ebc1649b4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to malicious infrastructure, likely for phishing or malware delivery.

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=livros+sobre+apicultura+em+pdf
    • http://xamokep.mileandathird.com/uploads/1/3/2/6/132682859/87d898b8.pdf
    • http://dokupes.terrieiner.com/uploads/1/3/0/8/130814328/zegusekeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/8276/3679/files/sixusaremikejonovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/collins_cambridge_checkpoint_english_workbook_7_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/0184/6688/files/810570273.pdf
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/central_transport_bath_pa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/kirchhoff_s_law_problems.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/brackets_editor_portable.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/25590431420.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/sijemasoxipuwek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/bepubapuxuxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/xewafiwizomus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/google_chrome_mi_nht_2018.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/mysql_show_foreign_keys.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_off00005e76.bin
4e7d6d088f870c8b87052276a6ee43c51bbe7560dd7253b88aa1fd1b7dde4d02
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E76 5440 bytes
font_01_sfnt_off000070e4.bin
e6e889b3aa0ba67e1a8ae1f48b9bec7b83e18606c22b9d5d32dd67b8f3ad9fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E4 13528 bytes