Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d531b8a5ea3242e…

MALICIOUS

PDF

38.7 KB Created: 2020-10-02 10:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dd2eb0f82474d13941de4f6075f3bb0d SHA-1: 24d309a234e70883d46ae99a78f02ec359a0f0b0 SHA-256: 7d531b8a5ea3242e28c179056d6bc22718428f1392eb52e0519e1e67ce4a6f60
154 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and contains numerous embedded links, indicating a link farm or redirection attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=darkness+rises+apk+hack', suggests a lure related to game hacking, potentially leading to malware or scams. The document body, though heavily obfuscated, also contains this URL and references to 'wkhtmltopdf 0.12.5', suggesting it was generated by this tool.

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.ru/pify?keyword=darkness+rises+apk+hack In PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/savenom.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/33432560687.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/40933044199.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/misitavo.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/molaxulekebejatixukuwado.pdfIn PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/40825654573.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/42147314344.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/69456902014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/zokukemojipovow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/2531/0367/files/39208022264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/burejosomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/how_to_zoom_out_my_chromebook.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 5052 bytes
SHA-256: e77797cb8df834766f3f8fb0f3be0db1f852cfc4ab084dcfaaa56168cf7d3cc0
font_01_sfnt_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 10044 bytes
SHA-256: 1e7485e98f852f6ce2871a9238ff4b0559a9040ec627da8469c1f42b5e9436a6

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