Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f0afe26b7d7c45…

MALICIOUS

PDF

42.1 KB Created: 2020-09-06 16:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 68559045ecf786c69b0fcc2ffb50b0a1 SHA-1: ba66e47b25986150de603cf6b7a6cce596923c16 SHA-256: 49f0afe26b7d7c45bd3e830f9915fd3ebcdb2f79967924f00ee990ec45eedc06
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though partially corrupted, includes the same URL and keywords related to diet and weight loss, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports a social engineering attack.

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=aliments+riches+en+prot%25C3%25A9ines+pour+maigrir+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/c618e9_a9b037f20daf438a921b6ec86e47f0e6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f1d680_288ec54b09604635bd5bfd2127833d95.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6860b9c7d6f949738318f04aabb7d47a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8de238_0ece7d3599904df3a3c73641a90b11a8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/the_octonauts_creature_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/2131212821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/28609920794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/71074124696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/mekewuvunaxozujutexuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/60785328651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/megazutikubujatagem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3290/1789/files/bilingue_allemand_franais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/applications_of_biotechnology_in_agriculture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6486/0312/files/relibezesovajajoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/coby_tftv4025_service_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 5700 bytes
SHA-256: aa6e14f178c1115fad53c807322b4606731d57449da03e2e0beeaf193d99cd63
font_01_sfnt_off0000740f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740F 11872 bytes
SHA-256: 6a23ddee5b85bd8e8dcbe87aae883aa062c409ec451109c8542d0eb8d26ad1cd

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