Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fbc3f8707e11f4…

MALICIOUS

PDF

42.6 KB Created: 2020-08-08 01:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12ae76f55265d36933c6ae7fb4a63e8 SHA-1: 0db62c00b9d21e6d2b6a4f01389c413f06c56efd SHA-256: 06fbc3f8707e11f4f009c1869a830dbd6c2479b94cc33d94f356ef88ccea2a39
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. The primary link, however, redirects through `ttraff.com`, a known malicious redirector, to a lure for learning English. This suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful sites.

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/pify?keyword=livro+para+aprender+ingles+sozinho+pdf+gratis
    • http://files.collegedreamsconsulting.com/uploads/1/3/0/7/130776791/1494641.pdf
    • http://domawa.shouqalhudaif.com/uploads/1/3/1/3/131378776/zitorumazi_mujag.pdf
    • http://files.shannondrhodes.com/uploads/1/3/0/8/130873907/1944747.pdf
    • http://files.heartfeltwoolexpressions.com/uploads/1/3/1/4/131483019/movotowonedafamime.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/65330858138.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/boxesiwogoviluwunamif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/bivazorizak.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/wosoburenagarotewesidej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/26975128277.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/international_auditing_and_assurance_standards.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/bugisozelosizokube.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/fases_del_aprendizaje_significativo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/15841425870.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/solid_waste_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/black_desert_sorc_build.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/51431837702.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_off000064a7.bin
e9b90f6982c67d52375998833c9499bd67c5987873feef42f14d0093761e6de8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 5352 bytes
font_01_sfnt_off000076ec.bin
df43c23c16169283dc93bb5164e3b6cd6644ef51f259192fa44873b35b0ec6ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 12244 bytes

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