Malicious PDF — malware analysis report

Static analysis result for SHA-256 6448e824d2caa83c…

MALICIOUS

PDF

44.0 KB Created: 2020-10-31 12:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2c0d274e8eebcdd4517c1ab527d3e0f4 SHA-1: 1d18b7bf14bab3fd5c1ea2d280ad9bcd230744ab SHA-256: 6448e824d2caa83c830f4ab649ac3e197551a03f3c96c8eaf643681890e46f2f
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=ella+enchanted+book+summary'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the document body contains obfuscated text and embedded URLs, suggesting an attempt to lure the user to a malicious site. The primary attack vector is likely spearphishing attachment, leading to a redirection to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=ella+enchanted+book+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f873deb77ec6.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/botisipizuz_supixikikijowa_kabexodonu.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/sofokitatew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f942355e1d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f93fba38d884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2093f65-9ebe-4a31-b415-99c7a6a03293/51981504939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4022/6483/files/table_tennis_world_tour_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0094/5564/files/nojowasunewoxejuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/71347907108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022f4c12-434a-4c22-b109-e61b62afc3f7/55499045026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6787/3182/files/polycom_realpresence_group_310_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4387/9594/files/vobugavir.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_off00006d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D47 5440 bytes
SHA-256: ebef580a8267a8bdb28c203a8a22e71ac9bf991ee383bb1d5341909707f090f7
font_01_sfnt_off00007fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA3 10412 bytes
SHA-256: 65ce2a472b0d204c536a5a75997fd15545d14f7ba5e6986721a9cb7dfca6c44c

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