Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c752bb041276479…

MALICIOUS

PDF

48.2 KB Created: 2020-07-28 10:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a743ac23b986531f8312d5080627b75 SHA-1: b8dc591a2d574319af7eb6a43603d93b81bd6bda SHA-256: 6c752bb041276479cd65a203382b0eb1f8d40999024c97f436195c42e865e10e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to 'canadian passport application form hong kong'. It also exhibits a PDF link farm heuristic, with numerous links pointing to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites via deceptive links.

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=canadian+passport+application+form+hong+kong
    • http://files.autheatrewing.com/uploads/1/3/1/6/131636758/voduxadorovo_radererep_nonipuzewometed_gotobes.pdf
    • http://files.lhfieldfamilyfdn.org/uploads/1/3/0/7/130738875/fipisalejisisizun.pdf
    • http://files.rustlingmeadows.com/uploads/1/3/0/7/130739783/dupibozewod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/72243531073.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/vabefogomezerupat.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/53379429357.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/fobipaxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/27551594031.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/runepizijipugutimapija.pdf
    • https://cdn.shopify.com/s/files/1/0434/2130/2946/files/53450202290.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/bafitexomenegarima.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/jinugonosugulamapezin.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/jegivutibut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/lotumezirerude.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/73154014509.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/nifiz.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_off00007e3a.bin
cd9bcacd73182d22eb3ea9976ddf3987877bdb367db206aa1526b9e3dd4f4996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3A 5324 bytes
font_01_sfnt_off00009020.bin
ed4dc06e2db91347de542bf340a224234db84835d3bfc37d1a041502bb7bbb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9020 10124 bytes

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