Malicious PDF — malware analysis report

Static analysis result for SHA-256 17799eed9f48fcad…

MALICIOUS

PDF

59.4 KB Created: 2020-08-17 10:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bb396d7b4f077696756c60471794b62 SHA-1: 43830ebeab4b4fd90714b6c3d54ac6bdace7b44f SHA-256: 17799eed9f48fcad7c646771ceb1b6c034f68d6978864a8c01d338eb1462a385
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a redirector URL associated with malicious activity. The document body, though partially corrupted, suggests a lure related to 'Apprendre le python site du zero pdf'. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. 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=apprendre+le+python+site+du+zero+pdf
    • http://files.empowerptandwellness.com/uploads/1/3/1/8/131857270/sivefesu.pdf
    • http://files.theframeandwheel.com/uploads/1/3/0/9/130969588/609740.pdf
    • http://files.deborahjonesdesign.com/uploads/1/3/2/3/132302787/mibamiwusurotameleg.pdf
    • http://files.mwprofessionalphotography.com/uploads/1/3/1/4/131453393/rifigun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/lonaradabakemeworakajarut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0946/files/65131039347.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/98948796266.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/canned_pinto_beans_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/82785020543.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/beatboxing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1626/files/el_neoliberalismo_en_chile.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/elite_dangerous_how_to_change_hud_color.pdf
    • https://cdn.shopify.com/s/files/1/0434/1923/8562/files/a_warrior_s_call_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/kizazutufol.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_off0000a85d.bin
eca3e71e1ebd4bd824d7a87a83c1b92b03c8718a39ad025961704c7e0879783b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA85D 5060 bytes
font_01_sfnt_off0000b998.bin
00acaa5aea472ad0833eb83eadc51968afbc207242b8fd0c080ba46a7c5637bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB998 12236 bytes

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