Malicious PDF — malware analysis report

Static analysis result for SHA-256 64065dd0ad0072c4…

MALICIOUS

PDF

46.3 KB Created: 2020-09-03 03:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bebb4c1b50673e8d879233efb857721 SHA-1: 49897ece2ed9a75b2a37b36ea0b28215f0900909 SHA-256: 64065dd0ad0072c483e2f04819408c7151452d6fed6f6217c9cad1580c4d3cd0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The PDF also features a large number of external links, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or redirection attack.

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/wix?keyword=whatsapp+status+bollywood+video
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_31a8c369cba9457ca7d3468049512af9.pdf
    • https://static.usrfiles.com/ugd/57c819_a78a64ce277944bba2e37434364e2a80.pdf
    • https://static.usrfiles.com/ugd/e02969_321c7b382cd349bab3bb71b8404a55c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b36690e44f14102b07a6aeeb259cabf.pdf
    • https://static.usrfiles.com/ugd/b8c837_106caa7c5cbe4af1aa47af34991217a0.pdf
    • https://static.usrfiles.com/ugd/c83fdb_7bfbf3c6eaaa4751b7200922c7b49d88.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/tupizaxere.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6179/files/how_to_spawn_mobs_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/jikowudewukinavopi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/samsung_j7_2015_update_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/grid_template_in_html.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/70324348255.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_off000078df.bin
a78f0d02776aadf0e687d43e14fc09287e018eebe947c02b27630ab08e4af3ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DF 5360 bytes
font_01_sfnt_off00008b30.bin
2f07899c3fb293387152dbbfab206f7352f75557cbdbf99469de028e81c5b9e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B30 9760 bytes