Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c978069778fd7e9…

MALICIOUS

PDF

43.8 KB Created: 2020-10-15 18:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b8e95b0e5ca2a08eca3e7cf2cee9c897 SHA-1: 63dc3e3fe52a004cf2a9f148f6f503e2614457d1 SHA-256: 7c978069778fd7e985bdcbed86cb5467183b76a825254c3528c6077e643f893b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs are the primary indicators of malicious activity, likely serving as a lure to malicious content or for traffic generation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=vedic+mathematics+textbook+pdf In PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/d9a41.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/6123605.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/defanopowokev_kogopaxikawu.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/1013917.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/lepusoz_doxuvufufebese_dasovoxulumu_texemukivuzir.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/mubanudolazenud_lilugosesuje.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/9d8450a7c8c5e.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/rujanusowijakefifa.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://site-1039274.mozfiles.com/files/1039274/tuxodexolitokofugapida.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/38373772425.pdfIn PDF document text
    • https://site-1042279.mozfiles.com/files/1042279/nike_mens_trousers_size_guide.pdfIn PDF document text
    • https://site-1042264.mozfiles.com/files/1042264/30113820511.pdfIn PDF document text
    • https://site-1040050.mozfiles.com/files/1040050/42908340656.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/kudofiz.pdfIn PDF document text
    • https://site-1042969.mozfiles.com/files/1042969/88819934566.pdfIn PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/detarorugalivolibadogeler.pdfIn PDF document text
    • https://site-1048456.mozfiles.com/files/1048456/tajuzimowixejoje.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/1/0434/8513/5014/files/lucie_brock_broido_new_yorker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/morse_taper_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/chromatin_chromatid_and_chromosome_difference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5700/0860/files/rubbermaid_vertical_storage_shed_home_depot.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_off00006d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 5504 bytes
SHA-256: 2ed5fe965ccf24cf180eb347d29fa3b17b4177ea3a30a3e89987e391b8114b9f
font_01_sfnt_off00008006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8006 9936 bytes
SHA-256: 116fac317b73527d60565fd0f6060b4c724009a06b1c33c66dc187367492215c