Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3088bc643030da…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 01:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7e5536a7ec87abe32458049a13cd15c SHA-1: 96ba4fdbf35907b968eb497bc6a627b773d5f1a8 SHA-256: 0f3088bc643030da89c05eeaa318dd0ab0c8ce0ebe98a5ca412c3d5acb2a37cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL, 'https://ttraff.cc/wb?keyword=automatic%20car%20driving%20tutorial%20pdf', is embedded within the document body, suggesting an attempt to trick users into clicking it. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=automatic%20car%20driving%20tutorial%20pdf
    • http://kabibem.rasacacorporation.com/uploads/1/3/0/8/130874277/85d1e4.pdf
    • http://files.prhospitalfoundation.com/uploads/1/3/0/8/130873769/a03f08.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/xakumisatol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/foziwunofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/linux_add_directory_to_path.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/69570332887.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/84283339224.pdf
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/wow_hallow_s_end_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0434/3388/5846/files/winrar_5._50_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/list_of_engineering_colleges_in_chennai_with_contact_details.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/mutobajujis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/xuwopatiwatoxufapez.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_off00006954.bin
39fe548f6b8f0223c854d1648460f42f2506a842e6000f2e9fc8e9fcdb361af2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 5348 bytes
font_01_sfnt_off00007b74.bin
917c4f203d054cc1762a8fc60f82d18f1f66e6567c54003746807bc6835208d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B74 9736 bytes