Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc065c24853358c…

MALICIOUS

PDF

48.6 KB Created: 2020-09-02 10:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c6b514dc2ec8018d3c0faee04ff653 SHA-1: b99af4b1e71fc76f8bfb7e1797300320ed2e42eb SHA-256: 6cc065c24853358c7efe6ce200b38b463d11293959431cce83df50c47b86199f
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, https://ttraff.ru/wix?keyword=adverbs+in+narration+worksheet, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be to drive traffic to malicious infrastructure through these links.

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=adverbs+in+narration+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/11f207_cf2db78a406a46bd8d13012410f5c5d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea19dab91f524c33acff764eb68a8f19.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_2e224add18c044998adf9f85385f9e37.pdf
    • https://static.usrfiles.com/ugd/5ecadc_276db9e21042465ab6dfbd6fcfb954d8.pdf
    • https://cdn.shopify.com/s/files/1/0459/5839/8111/files/hoarding_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/53130342259.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/dbz_budokai_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/antagonista_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/julun.pdf
    • https://cdn.shopify.com/s/files/1/0437/7722/8957/files/49673058577.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/taloji.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/distributive_property_and_combining_like_terms_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/92755355691.pdf
    • https://static.usrfiles.com/ugd/b7082a_4b246461f88e4297bc65b469871dbb80.pdf
    • https://static.usrfiles.com/ugd/f459ea_e58cac9d2ffd4ea88788b323dcb9e000.pdf
    • https://static.usrfiles.com/ugd/4b874d_7751b69ba1a3453a9bda441a231e81f3.pdf
    • https://static.usrfiles.com/ugd/e73fea_922b522a6e0a46bc92e97f26e4274aa7.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_off00008050.bin
dee0763349f8d2457f93c5d2b3b8eee064dd33b6461ad7367ec0e9cdd9b52208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8050 5224 bytes
font_01_sfnt_off00009226.bin
67540fd7758dd1f35c65ae06d1db5b815e639c5fda9e8642c6b84708b0356036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 10308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.