Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d6307a60d84b59…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 04:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d23ea6f246119ec74b5cecfe09182ba7 SHA-1: dd8498a8b52834938fc3fb7e487190c7437c915a SHA-256: 82d6307a60d84b5993f3dd836529559ddea209c7581909a448490ba442502376
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the ML classifier and redirector heuristic strongly indicate malicious intent, likely to lure users to malicious content or phishing pages.

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=les+articles+definis+indefinis+et+partitifs+pdf
    • http://files.douglasshaunephotography.com/uploads/1/3/1/0/131069860/c3c86af13554.pdf
    • http://files.kubeimport.com/uploads/1/3/0/8/130874009/guraxutefuzujes.pdf
    • http://files.earthwisdominstitute.org/uploads/1/3/0/7/130739570/2893334.pdf
    • http://jevezen.akomaarts.org/uploads/1/3/2/6/132695818/3584b195c07154e.pdf
    • http://files.writingmyownfate.blog/uploads/1/3/1/6/131606875/zazazora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6498/3701/files/alejandro_dumas_libros_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/6789944451.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/magemitoxuvepesosuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/descargar_fisco_agenda_2020_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/albacea_peru.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/likadofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/pufumaxoxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/7914391360.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/futiwapajovo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/72462904176.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/blood_type_o_diet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7293/8399/files/definition_of_conflict.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_off000063e8.bin
cf43daf2dab2d453656c6afc4efb2438edb8e46051df66c66e508c27d838860d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 5092 bytes
font_01_sfnt_off0000754b.bin
0c6e25da54ec8ac6319284736f72e1d343b77d7338dc29736592bc5bcde9cb92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 12088 bytes

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