Malicious PDF — malware analysis report

Static analysis result for SHA-256 66439c3616326e7c…

MALICIOUS

PDF

55.9 KB Created: 2020-08-31 14:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7d9f0b22cb136aa5c09fb168b87dfaa SHA-1: 4ab4bdea34ae89ebcd282c03c3d7626b5dbbd3b5 SHA-256: 66439c3616326e7ccbb07eda99d8e6995e6a3428501137d9003924238c4cb01e
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a report. The document body and embedded URLs suggest a phishing attempt to trick users into visiting a malicious site. The presence of multiple external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.club/pify?keyword=landscape+review+final+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3d9449bcc04a4a73972dae8474ec9713.pdf
    • https://static.usrfiles.com/ugd/89064d_272fc7693dca40fd8dada6485f99dc38.pdf
    • https://static.usrfiles.com/ugd/b8c837_b123be8c0201488683a476f07ac20436.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dbb0c6315ab470990b15fa186d3b1ef.pdf
    • https://static.usrfiles.com/ugd/4c1554_582324cca97142d28f92f729f4b22fac.pdf
    • https://static.usrfiles.com/ugd/48d9a1_3f2e929a5735498ba2db22aab079e10f.pdf
    • https://static.usrfiles.com/ugd/26938b_b0edbc9284da4bcfb6fac70ccd0d75e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0863faa061b443293b9a1a6ff43e43f.pdf
    • https://static.usrfiles.com/ugd/a91264_2906760923c54d6c9c4c3deab17e864a.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/ganapati_atharvashirsha_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/mavikesazopizodeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/numerical_mathematics_and_computing_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0459/8779/1010/files/3826907383.pdf
    • https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/8331
    • 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_off00009dfa.bin
899b1f0897bc41435ff756efc5c4fc49508c085ab06468e853039627daedc4b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFA 5244 bytes
font_01_sfnt_off0000affe.bin
bda905334946628d9593bcededda0ef1a6f320bd5e790630cd092801f390e17e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 10252 bytes