Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d934a23b952bef3…

MALICIOUS

PDF

56.4 KB Created: 2020-08-25 12:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4a85f86ef0570658b5295f864147d5e SHA-1: 7cd2dad11ca4d95d97f1799edf8b94166ffd72a4 SHA-256: 5d934a23b952bef3b2f10df81c4efce4d0c9faed87a1088db8f4e130e4e7f391
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, suggesting an attempt to lead the user to malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to obscure the malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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/pify?keyword=2002+chrysler+pt+cruiser+manual+transmission
    • http://files.breadventuresnj.com/uploads/1/3/1/4/131438490/6a3ad36885deef.pdf
    • http://files.isaakthetutor.com/uploads/1/3/1/8/131856134/8308844.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/25978881176.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/granada_albeniz_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/wajorigulinoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/commercial_invoice_template_uk_ups.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/wuxedafo.pdf
    • https://cdn.shopify.com/s/files/1/0461/0503/4915/files/89037220826.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/kowagemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/xeravusuxugodalurididu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/juzenupilozemuzu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008101.bin
fa012fed20a2d8898ac476a9a23a5d12508bc1519f54e77c33f5f49b3608515b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 5456 bytes
font_01_sfnt_off00009361.bin
e81e4d2dacb30d1cd52b4898df272a30993994e08a0c4c5003686eb4b8f998fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9361 13856 bytes
font_02_sfnt_off0000bf9d.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9D 16060 bytes