Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a434ec6d4fc7cc3…

MALICIOUS

PDF

44.7 KB Created: 2020-10-31 08:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bba29aa05beea2e8a60f86cebd88aa08 SHA-1: 1fb31c146ca51252e999620a0b500c2bd6c79245 SHA-256: 1a434ec6d4fc7cc34df54acd53e1804ede6eca818cddaa8b42edf3cd7dbc3e06
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/123?keyword=illinois+state+animal+white+tailed+deer, is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous other PDF links, suggesting a coordinated effort to distribute malicious content or phish users. The ML classifier strongly supports the malicious nature of this PDF.

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/123?keyword=illinois+state+animal+white+tailed+deer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8ea5d2a4444.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/9634554.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/fuxut_nojilalegi_doxoju_diluvoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f91d3f573756.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/5442887.pdfIn 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/1/0504/7156/7559/files/nazm_hikmet_hayat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0126/5566/files/lost_sectors_tangled_shore_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1610/2330/files/zebijidepiketifivita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/wesizavadita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4346/2561/files/zip_files_opener_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/tamil_books_and_authors_list.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_off00007180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 5096 bytes
SHA-256: d4b5ccde9a1bfc8d4fde5dca82530907108ecda8365e3daee368ce452c6835d0
font_01_sfnt_off000082b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B3 10892 bytes
SHA-256: 7075f5b2b1cd80112e56868697f237f528a2ab6005b6bd1a5aed2de5bea2cbb7

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