Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc89c69b67eddd4…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 02:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e9ebac15649b3d4c367a40096dec48 SHA-1: c04762f32732ac69b8550432abd70e77979cbe38 SHA-256: 6dc89c69b67eddd4154dcc3f2d6f9dbada19201fe26d35a6dc91b3ac039244c5
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a Bible commentary and a URL that appears to be part of a link farm. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be tricking the user into clicking the malicious link.

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.ru/wix?keyword=believer%2527+s+bible+commentary+william+macdonald+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/34ec99_de70cdfd7c1f43358b0fa2182e1291a5.pdf
    • https://static.usrfiles.com/ugd/b65acf_89470952a4b642c5ae0bc6c351ecac23.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bf834038ac2425ab653fe22675e28e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_951fbc97f0314ad6833cd4c16376dd10.pdf
    • https://static.usrfiles.com/ugd/451a43_32ecaf651a704ee6983a24744577b847.pdf
    • https://static.usrfiles.com/ugd/be19e1_f24669d2f4ff4801be043a8395ea93fb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/jutufatapejixufunutok.pdf
    • https://cdn.shopify.com/s/files/1/0428/8954/3836/files/38012357081.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/54818129285.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/bebekovugokofetajimiv.pdf
    • https://static.usrfiles.com/ugd/1813b3_002a6910fbf243b9bd7dd1bd5427d6c7.pdf
    • https://static.usrfiles.com/ugd/cdb50c_d074137320dd40cc884e49033b0944c5.pdf
    • https://static.usrfiles.com/ugd/565485_fdbff31531e4467aa61d7a9648986fb0.pdf
    • https://static.usrfiles.com/ugd/79e0dc_d831c98720d44ad68ee81020e4c5f65a.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_off00006b58.bin
e7b3aaae01882f33fe7f4ba80ed2de3763f0b0298ed0dba7ac69b43c6389386b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B58 5780 bytes
font_01_sfnt_off00007f08.bin
cb0da16420782fb8db36d4313ee81449724835545e078044d384ebf288203591
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 10352 bytes