Malicious PDF — malware analysis report

Static analysis result for SHA-256 7461e40740ebac25…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 09:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 500aececd6c2a72088356fde9e89bcd5 SHA-1: 72c9c30ac60a2ddbb15b7bf40df7b5525187007b SHA-256: 7461e40740ebac2595ec940464123f5901895ead8a440e49cd13c849706a73fa
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The document body also contains the URL 'https://ttraff.cc/wix?keyword=thor+ragnarok+korg+script', which is likely intended to lure the user to a malicious site. The presence of numerous external PDF links suggests a link farm, potentially for SEO manipulation or to host further malicious 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.cc/wix?keyword=thor+ragnarok+korg+script
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_094417feb9f5406e903493728ffa6467.pdf
    • https://static.usrfiles.com/ugd/0789d5_eb6ce5e56e504d5db1895f1d372028dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c2ee0dedd6a448a91324ba382142939.pdf
    • https://cdn.shopify.com/s/files/1/0439/8887/7470/files/72128822340.pdf
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/96912216023.pdf
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/because_so_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/30667934995.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/nimapopexudapogagureneta.pdf
    • https://cdn.shopify.com/s/files/1/0443/8907/3062/files/pdf_annotator_mac_os.pdf
    • https://cdn.shopify.com/s/files/1/0435/9965/9176/files/18795978675.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/valkyrie_profile_psp_iso.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/wreath_builder_templates.pdf
    • https://static.usrfiles.com/ugd/191a6d_4147cf597a514a6c84fe17843b340b84.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf36f6b73d654dffb9ad9e1c2509dd58.pdf
    • https://static.usrfiles.com/ugd/5be868_5f8b99d4b5c143bb8075f0eccd80b013.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_off00006723.bin
659a5b3dc2c4693b3de4dfcc35f82e3afc772b84654ddedde4a18612cb808be8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6723 5176 bytes
font_01_sfnt_off000078bf.bin
cf33ae3916f47ee9e04e10cc0539b07b54a3e94e824e1315b515c4249c36cfd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 10384 bytes