Malicious PDF — malware analysis report

Static analysis result for SHA-256 69926e8937df98eb…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 22:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d3bd8e8809ec0d3b8acd24472e6b827 SHA-1: c88ee2375fafc889704f3af05845530664e6654b SHA-256: 69926e8937df98eb983e71c346325ce96e03b9cc929ba190ee38c7bf9560a5ee
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious infrastructure. The primary redirector URL identified is https://ttraff.com/wix?keyword=ed+protocol+free+pdf. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to lead users to malicious content, likely for phishing or malware distribution.

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=ed+protocol+free+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a98497e1b8d24f86be0b459402fb4a51.pdf
    • https://static.usrfiles.com/ugd/74e9cf_8d163d9696164f68a8772a556ecc7183.pdf
    • https://static.usrfiles.com/ugd/a43ec6_a4bd926891764662a39aba14c25fc492.pdf
    • https://static.usrfiles.com/ugd/b8c837_41ac5ccd51e14f04a62e0b6039b684e1.pdf
    • https://static.usrfiles.com/ugd/191a6d_ef653d4e89da4beb9ae05751044d50d9.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/ceramic_tile_design_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/xowekiweserazajamu.pdf
    • https://cdn.shopify.com/s/files/1/0463/0786/8834/files/donkey_kong_64_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/39270545653.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/rabaturapepizatijot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9951/2231/files/65878740815.pdf
    • https://cdn.shopify.com/s/files/1/0433/2411/3049/files/wosijikeriwuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/gmail_tieng_viet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/skripsi_akuntansi_keuangan_2020.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_off000077fd.bin
12883d785eea5ae9fa12d3f84c852aed5dc5a6cf930834977bc26aebe089895f
pdf-font-stream PDF embedded font (sfnt) at offset 0x77FD 4720 bytes
font_01_sfnt_off00008821.bin
9d7720f1e6c1830c50f2f4ab5e0b64481d18a4802a363d277ecdc5ca603c6344
pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 11440 bytes