Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ce4c73b1f8ed0e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 10:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa45e84d9017e0d7eaa01bf6f45ad943 SHA-1: dc2bb38acdf051c188b33973d70476da867eca47 SHA-256: 01ce4c73b1f8ed0ecd7b68c389b91dd39d3d6a8e8ffbb31d6b0613a9cf5fa2c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=microsoft+bluetooth+mouse+3600+manual
    • http://files.rug-cutters.de/uploads/1/3/1/1/131163969/1928582.pdf
    • http://files.westhampsteadchristmasmarket.co.uk/uploads/1/3/2/3/132303118/dc4886dadfb812.pdf
    • http://files.armandalegmusic.com/uploads/1/3/1/4/131408103/bd8709.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/rubebek.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/25545659202.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/zobafomato.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/82457208444.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/biozone_aqa_biology_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2788/2407/files/kexajabotanazoneruteladok.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/apposer_une_signature_sur_un.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/87955275156.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/mopibawiwutufe.pdf
    • https://cdn.shopify.com/s/files/1/0454/2873/6168/files/linear_functional_analysis_springer.pdf
    • https://cdn.shopify.com/s/files/1/0450/4325/3406/files/uppercase_letters_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/canon_lide_110_button.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb3.bin
c23d83aff984373e09dfe52c9a786f75a328b296a7b7cbb02ee25e4764c81701
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 5728 bytes
font_01_sfnt_off0000720a.bin
7c853a50ee1304bbe0dda52d2fef5751432d42bf27e35c07864472264f2a2d46
pdf-font-stream PDF embedded font (sfnt) at offset 0x720A 9832 bytes