Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c14214d04086678…

MALICIOUS

PDF

42.6 KB Created: 2020-08-22 09:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6194b6da57d0027dd9d375cd879a5cf9 SHA-1: 01a5fdd4a125d4f5da658df96dca7a2cf35cd1ed SHA-256: 0c14214d0408667866e0b6fdcc411c183808a179bc4961f1f23683d3a5e6c0b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to potentially malicious sites. The primary redirector URL identified is https://ttraff.ru/pify?keyword=double+line+graph+worksheets+6th+grade. The document's structure and content suggest an attempt to disguise malicious links as legitimate resources, likely for SEO manipulation or to distribute further malware.

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/pify?keyword=double+line+graph+worksheets+6th+grade
    • http://files.duluthfinepianos.com/uploads/1/3/1/4/131452811/3ba0a88.pdf
    • http://vovig.abundanceworldwide.org/uploads/1/3/0/7/130738629/9453247.pdf
    • http://files.carneystudios.net/uploads/1/3/0/7/130739379/3963286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/executive_administrative_assistant_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0464/9415/4904/files/mortgage_gift_letter_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/marvin_harris_el_materialismo_cultural.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/ahpra_psychology_registrar_progress_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/bogiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/rotalumemiwibamakom.pdf
    • https://cdn.shopify.com/s/files/1/0443/6059/7660/files/cancer_de_ovario_signos_y_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/57067849202.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/89384872068.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/56236700619.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005332.bin
536ce0ec7c4066802799f828a4042b481aa0f79c3a2b0dfa444d3d5152cdf9da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 5672 bytes
font_01_sfnt_off00006687.bin
266b425b982a1f4955ef7fa2c98933865a4a76076e3f6500862696cff8084577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6687 9852 bytes
font_02_sfnt_off00008869.bin
edc33fe94617b35fa5734827a91efdc9665031ac3a5a8b8018a6396f4204b3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8869 16116 bytes

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