Malicious PDF — malware analysis report

Static analysis result for SHA-256 415fa0f75cd7a15c…

MALICIOUS

PDF

41.4 KB Created: 2020-08-13 18:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fddcc4f474380eccbd5d346a0fdeedd9 SHA-1: a52fd2f7a81684654dd83b2f788eb5f8eab097a2 SHA-256: 415fa0f75cd7a15ccb4f25dcb3880535be233e990a47e521c8d5c0a8fe522fe4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to ttraff.com, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, mentions merging PDF files and includes the malicious URL, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=merge%20two%20pdf%20files%20using%20c#
    • http://files.createdheavens.com/uploads/1/3/0/7/130775292/firapusikojosed_zekonifebuzexak_pixigekuxiw_serudumer.pdf
    • http://files.sagehousebathnbody.com/uploads/1/3/1/4/131406811/2672107.pdf
    • http://files.beerandwinefiltration.com/uploads/1/3/0/7/130775232/4558111.pdf
    • http://fadun.broadwaypinups.com/uploads/1/3/0/7/130775475/jolukugi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/material_safety_data_sheet_for_chemicals.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/51178372945.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/69392197153.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/gozorilajozupuwomijaxid.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/28884003697.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/fusionner_diviser_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/14323502121.pdf
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/nisawomiboselawal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6466/3967/files/school_attendance_register_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/7629/5592/files/allopathic_medicine_book_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/mozaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/bowlby_s_attachment_theory.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_off00005eed.bin
8b5d122d3cd51ad660ec461c2e7c97345ddb63fd291d3b71bc5933d48884c342
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 5208 bytes
font_01_sfnt_off000070d9.bin
fe9e8f9ee63f2916512e1bb056d70fc21c2ab94fe1e0752297b6e3cbae4da096
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 12144 bytes