Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c4c90529164ef1…

MALICIOUS

PDF

45.1 KB Created: 2020-09-08 01:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d13969d0369f7ea48d98d4a60d6f18 SHA-1: 571b6bb39994fe3b6c3269a0411c5902dab3bd7c SHA-256: 60c4c90529164ef1bea00be52f53d419c6e2cad1747c4262ec8a78ac30836c03
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.link/wix?keyword=himnos+cristianos+letras+pdf'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to Christian hymns. The presence of numerous other PDF links, many benign, suggests a link farm or SEO manipulation tactic to distribute the malicious URL. No scripts were extracted, but the primary attack vector appears to be directing users to a malicious site.

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.link/wix?keyword=himnos+cristianos+letras+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_38511c11674340fa94f471187ca1020b.pdf
    • https://static.usrfiles.com/ugd/97368a_166b7b24a5fb4fc38c905423a68e860c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c87dbd217165444982bf33fe136bafaa.pdf
    • https://static.usrfiles.com/ugd/87a178_8f440f62d71b4b0c87c83d1f12787a83.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/64515844809.pdf
    • https://cdn.shopify.com/s/files/1/0434/7481/3090/files/spreadsheet_software_microsoft_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/taurus_horoscope_ganesha.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/71827191210.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7191/files/jurnal_akuntansi_sektor_publik_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.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_off00005e3d.bin
d1ccdc1bdb88f2c94bd07954ecd9c7750293ef353d371f16a243557c33868666
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3D 5048 bytes
font_01_sfnt_off00006f3c.bin
ee51cf582b576196779e2592efbc931d232ae829f32ac783f2a6c7a8cc3999cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 14132 bytes
font_02_sfnt_off00009a15.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A15 4324 bytes