Malicious PDF — malware analysis report

Static analysis result for SHA-256 632fcd306278f3b0…

MALICIOUS

PDF

49.2 KB Created: 2020-08-16 20:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78718972964e90313e54bd23c5c4b968 SHA-1: 48c4b1810578ee4ae111db75bbbfb2030e848ce9 SHA-256: 632fcd306278f3b0ce48af9957a83af22c4fa2d3d8cc0bf9b499caed3525b796
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to generate SEO traffic, with one prominent link leading to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing a "game changers book report" and includes the malicious URL, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the link farm structure indicate an intent to redirect users to harmful content.

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=game+changers+book+report
    • http://sebupopul.vloc.org/uploads/1/3/1/6/131606490/mifenupu-zafunurin.pdf
    • http://files.bigfootdancestudio.com/uploads/1/3/1/4/131453990/7906586.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/antagonista_y_agonista.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/caveman_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/6608219787.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3215656586.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/55123891328.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/kotlin_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/29844795064.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/gatuwobamowowizujasigigo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073d6.bin
2431e3e7a1d70ac134f0ea871c10dbc6fcb74ca014f1f11497de7edbdd803c80
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 5288 bytes
font_01_sfnt_off000085a0.bin
634f50fa94282b4b4258a365717263454a40bb10ef46fc80a0e50797921e2d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A0 10652 bytes
font_02_sfnt_off0000aa08.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA08 4324 bytes