Malicious PDF — malware analysis report

Static analysis result for SHA-256 65090b7c6a10e6c1…

MALICIOUS

PDF

45.8 KB Created: 2020-08-12 22:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52a1104077491af7e7279285063476e9 SHA-1: 605df8e8db8c33925278d45cf24d294e6fd83687 SHA-256: 65090b7c6a10e6c1000e181066a3e5ba776d9837147fd61ca2a5dba73d63300e
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com. This indicates an attempt to lure the user to a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

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=both+either+neither+pdf
    • http://files.littlepoppitsphotography.co.nz/uploads/1/3/2/8/132815924/lisuxuv.pdf
    • http://files.jackhammerjet.com/uploads/1/3/1/4/131438113/marunak-roxog-sumefo-puritavuj.pdf
    • http://files.thehappyfits.com/uploads/1/3/1/3/131383771/6573965.pdf
    • http://files.nutribizcorp.com/uploads/1/3/1/3/131378821/gimebikawunov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/90157877737.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8838/files/libro_biocentrismo_robert_lanza.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/lider_autocrtico.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/waste_materials_used_in_construction.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/anil_s_ghost_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0445/2987/7151/files/fusionner_plusieurs_jpg_en_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/woxeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/zawonejakudijupupupekowo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/business_studies_class_11_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/birthday_invitation_letter_sample.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_off000061b3.bin
44a629b256578e4a23cd76b46a1082f5b19b8b8b48e44c51395f0de187216f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 4756 bytes
font_01_sfnt_off000071dd.bin
6974e142b747ad124d505bf81a38e659c314a8067a6407b1dcd0254f8a6a76c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10120 bytes
font_02_sfnt_off000094b9.bin
43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B9 16148 bytes

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