Malicious PDF — malware analysis report

Static analysis result for SHA-256 678f85013372ebac…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 20:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd00a3fd5ee70e1f48ad45aa90df6b0e SHA-1: b9c0d770f9b5a730a92935c2094200a15369e3b9 SHA-256: 678f85013372ebac575e885742f91490025ab088a6d250e8d73cce46117e8be1
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body and embedded links suggest a lure to a malicious website, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL reinforces this assessment.

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=cdl+manual+in+spanish+nc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/10e3af_2ceef3b2ad604860a86da39770fa69d0.pdf
    • https://static.usrfiles.com/ugd/c345b0_e320075f709b48c48bebe8ef973b49aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef293696e40146b081cc655ead63f4dd.pdf
    • https://static.usrfiles.com/ugd/ade4e6_988a1ed5776248c79ed099485bf2312d.pdf
    • https://static.usrfiles.com/ugd/724bd4_1b729cc199074094b9141244f784a56f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f30c5b81840947059d01847d45cdc094.pdf
    • https://static.usrfiles.com/ugd/e3c460_31ddfdc5d9ae4dfd956887d2a0c57608.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc25def020a549a4badb8957350bcc05.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_918a524e3d5d4a1dbdd48198b9e34023.pdf
    • https://static.usrfiles.com/ugd/ab922d_1d4129a527754493af23b90ee4b4e20b.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/sovew.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/cmaa_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/45478789197.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7798/files/date_dimension_table.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/jedetajik.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_off00005aa9.bin
a2fe7ca29b3b36e51f29326adc31da3903c7853c580423d9ded4384280725b79
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 5120 bytes
font_01_sfnt_off00006be5.bin
adc783b658988082be5c9945f88ff9fe9e2431e97e5b1a58d1cc658891e7e8b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 9860 bytes