Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d567ecd6325e56…

MALICIOUS

PDF

35.9 KB Created: 2020-08-29 15:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14543d07f7c00dcf50af37a3dc660687 SHA-1: 3c5d39e44b92a222970cc8996d0df71f89b9fd14 SHA-256: e0d567ecd6325e568a26ee0f0c67e7faa57b13a4eff0384d6bb03d46cddc6780
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'stretching chart poster' and the URL 'https://ttraff.com/wix?keyword=stretching+chart+poster', suggesting a lure. The presence of numerous Shopify links indicates a link farm strategy, likely to obscure the ultimate malicious destination or to improve search engine ranking for 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.com/wix?keyword=stretching+chart+poster
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/kovebomexonox.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/gamix.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/33030524770.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/64768510309.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/sowisoxaloporevapojop.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ae48edabf42431f82e015024c6b0086.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ffab781c4bc4666adb663c2f77c9830.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_b108469fbc30418093e589c7844dd13f.pdf
    • https://static.usrfiles.com/ugd/b8c837_85c5b475ebea4a0083cc6db326990085.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/josadejug.pdf
    • https://cdn.shopify.com/s/files/1/0462/6903/8749/files/bible_fellowship_study_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/auxina_tricogena.pdf
    • https://cdn.shopify.com/s/files/1/0462/1287/4394/files/graphing_polynomial_functions_worksheet.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d2f.bin
fe26906622fc57e12fb10a3fb574a417fd5da2108768dfdcbfc824c39427951e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2F 5264 bytes
font_01_sfnt_off00005f07.bin
3e6332ef727078b4e6f48537eb43dd73c171630e5fafeb63010a2c9efd0d07d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F07 10504 bytes