Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf546963449194bc…

MALICIOUS

PDF

45.6 KB Created: 2020-08-22 20:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48fc2001712c4a42d5da856271761ee SHA-1: 4441442403f2e9b0be3a4d2f958ae9479f5c7afe SHA-256: bf546963449194bcfbd1f7a8fed061424f708406b05683aee4b138d5eb2eacd9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and keywords related to 'Sarcoma de Kaposi HIV', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=sarcoma+de+kaposi+hiv+pdf
    • http://files.apexlegalservices.net/uploads/1/3/1/3/131379615/kogogutasuw_gerumugufiv_godesatedoximi_xejexonebuta.pdf
    • http://supiduxip.thestrongestfish.co.uk/uploads/1/3/1/4/131482993/2558458.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zamujogeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/wupufodopovodosamev.pdf
    • https://cdn.shopify.com/s/files/1/0465/3291/9446/files/korean_drama_free_site.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/aladdin_a_whole_new_world_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/integral_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/fofuvawosa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/tepejosepofizugif.pdf
    • https://cdn.shopify.com/s/files/1/0437/7093/7495/files/absolute_and_relative_bioavailability.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2916/files/management_of_cardiogenic_shock_complicating_acute_myocardial_infarction.pdf
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/birkary_poly_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/wirekizox.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/akademia_pana_kleksa_streszczenie.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/
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/birkary_poly

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073e1.bin
4d5049404d85d9af58883c6c70d3583242d1b204618469afeda0d25222155ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 5588 bytes
font_01_sfnt_off000086bb.bin
3559662cf3b40a63fb82f943e5a981bb3022bd8fbb680a670ac5e4f4f7b1c3e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 10140 bytes