Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a30ca2b090f9a2…

MALICIOUS

PDF

48.5 KB Created: 2020-08-30 07:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d994bcca43e67ee4ae9c45f9e862f12e SHA-1: 2166cc46dea295b6776ad7c180ef922050320240 SHA-256: 71a30ca2b090f9a20b7ba570b8dd9dedda9bf3e8d0e48abcf49f6c6280841fb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious sites. The document body, though partially corrupted, contains the URL and a product name, suggesting a lure. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, further supporting a malicious intent to redirect users.

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.com/wix?keyword=sunbeam+alpine+serie+5
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5d758355a40747b78d801443d6e8c92f.pdf
    • https://static.usrfiles.com/ugd/405339_573a6d9950504fb08b6464ea07cabd9d.pdf
    • https://static.usrfiles.com/ugd/b65acf_afbc96c58d974acd915551bddaddf39b.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/bobina_de_tesla_experimento.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/adiabatic_and_isothermal_process.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/43772847180.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/wekugez.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/gevavujigalojixakupuke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/kutolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1418/5372/files/29612229628.pdf
    • https://static.usrfiles.com/ugd/b8c837_c50df6885442472ca5829a6d535b2737.pdf
    • https://static.usrfiles.com/ugd/cf79db_3d0b0c25e1734b9686becb61984493ad.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_off000080ab.bin
4f248eae3bc4e07deae1a5b68421598da258797100a02b4ccaa3cc867168eb93
pdf-font-stream PDF embedded font (sfnt) at offset 0x80AB 5332 bytes
font_01_sfnt_off000092b3.bin
db055903dff8f8fb8cfcf483f7393852c3cb3d5787e61dcf7cfe3e413efb50ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 10208 bytes