Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68bfe354ca8254f…

MALICIOUS

PDF

42.7 KB Created: 2020-09-03 09:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 22abc0daf102efceb2b4ec3ded6ef515 SHA-1: 6d6c4254d671fa69bd50de4fab93257fad3dd1ca SHA-256: a68bfe354ca8254ffb702163de6a2f0a1dc138abb7d7a802c58363cfb7755886
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious link identified is 'https://ttraff.ru/wix?keyword=best+anime+opening+songs', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, likely to create a link farm for SEO manipulation or to obscure the malicious redirector.

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=best+anime+opening+songs In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/abematv__android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/satodozumebatewox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/bootcamp_drivers_windows_10_6._1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/imperialismo_japones_caracteristicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1050/5373/files/razokibiparep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/integral_calculus_basic_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/coutinho_barcelona_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/jiverujixarexugal.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ba3095_7dd694157e0e412ca7cd6fcc8a3d3a38.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/469aea_127ddb8e4cdf4c6786a1020f1188d9cd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9ff9b8_780b34b3b830462fa98b17fbd19651b6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_eeb644a8260646139682e89063430a1d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/susuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/teamviewer_8_for_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/70452735280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/12993715072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/1788/7898/files/ronadodoxemok.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_off0000696e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696E 5060 bytes
SHA-256: 3962ff85bf52cd696ddb11824e04b4d04e51232e290a317198eac6f03a4789f2
font_01_sfnt_off00007a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9C 10636 bytes
SHA-256: f32c0da5635f6a9b91bf99d3fd72889027b6983481738598c22454e03474f1c8

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