Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fb99b576b5e9f0…

MALICIOUS

PDF

36.4 KB Created: 2020-08-31 11:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce8a1c8e210321e76f19429807e127d SHA-1: 83600f6b7eac502854d986b9d709a5814ed5804c SHA-256: 06fb99b576b5e9f0b64bf685c9cb545d3ff1a544a3006eb9f32740af8f0f0207
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, masquerading as a link farm for PDF documents, with the primary goal of redirecting users to a malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically identifies the URL 'https://ttraff.ru/wix?keyword=neil+darby+architect+belfast' as malicious. While no scripts were explicitly extracted, the structure and embedded links suggest an attempt to exploit user trust and potentially deliver a secondary payload.

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=neil+darby+architect+belfast
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/18636836188.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/gexafevurubedegapowaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/88698821347.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/97662834765.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0666/files/tutorial_java_swing_netbeans.pdf
    • https://cdn.shopify.com/s/files/1/0447/2678/0060/files/3d_printed_batarang_template.pdf
    • https://static.usrfiles.com/ugd/e1c37d_dd2f1f88c34a457caa4025ae50446cd1.pdf
    • https://static.usrfiles.com/ugd/26938b_16a0d5bc4b5740aa897943e8977722d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_22d96b4d38574a55803ce024e437b3e3.pdf
    • https://static.usrfiles.com/ugd/38bf1f_23c05aa283124493a84983ae9128fd19.pdf
    • https://cdn.shopify.com/s/files/1/0439/9231/8110/files/navemulepev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8535/6449/files/alternative_energy_books.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_off00005122.bin
d18a01b0c4b453fe2e0c2692775a2a860661ee2b1ff5dbe32c3303a5c3ca302a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5122 5320 bytes
font_01_sfnt_off0000632c.bin
554771ba59a1d99d7572802f6d412534ba559c082b3c62c59054c2abd4c7105c
pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 9896 bytes