Malicious PDF — malware analysis report

Static analysis result for SHA-256 1264e52873e604e8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 00:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45539293b2a21802dae8126da605bf21 SHA-1: 48ab81a11239132dfdcc7748e107b994840f3d9b SHA-256: 1264e52873e604e892b324b66b59ec2f5bd0038912542e7de3fe457be7702669
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.ru'. This URL is also present in the document body, suggesting an attempt to trick the user into visiting a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, which could be used to host malicious content or obscure the true destination. The ML classifier strongly flagged this PDF as malicious.

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=call+using+internet+android
    • http://files.melissa-schmidt.com/uploads/1/3/1/3/131383760/wududekeredameli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/42nd_constitutional_amendment.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/49385209952.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/12323073641.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/munofomevin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/nodifudite.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/academy_stars_2_workbook_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2736/5031/files/52104476664.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/pelelemopoba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/86425860862.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdf
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/anime_x_wallpaper_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/xiximadiditupowitufe.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_off000063ca.bin
f465c47b163fb909574aa5ae1f81a0252536cf483dec414d0aa42b3975322f04
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CA 4896 bytes
font_01_sfnt_off00007474.bin
9f0661a417c7985e6548ee7635e85b9779c950d6b6b2178baf57172e1de20dcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7474 10424 bytes