Malicious PDF — malware analysis report

Static analysis result for SHA-256 6593bcb091d71b02…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 08:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8370d2978406b5751bb1e55105c23cc SHA-1: 6266de675ec2d2bf5110f2ce918f602701a4a800 SHA-256: 6593bcb091d71b0218fa17be3573d77bff34966b767f31e88a4fa4763c7b2ba1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with a seemingly legitimate name. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the embedded URL confirm this malicious intent. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting an attempt to generate traffic or distribute further malicious content.

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/wix?keyword=garcia+de+oteyza+oftalmologo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cdb50c_058c00bccfa14f0dbe6d95d7bcfab5fb.pdf
    • https://static.usrfiles.com/ugd/ab922d_f687f1061ee043ef961258a3fe2db225.pdf
    • https://static.usrfiles.com/ugd/34ec99_d38105c10f2e4be5a6addc7d5f200917.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/6389442072.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/tri_fold_brochure_template_microsoft_word_2013.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/pokemon_emerald_game_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/captain_marvel_1234movies.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/ny_giants_injury_report_week_4.pdf
    • https://static.usrfiles.com/ugd/f515ca_67875daed83b48e5a675502425adbe17.pdf
    • https://static.usrfiles.com/ugd/429b25_e892ef206e4f493c95e654dab7c30bc6.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_off000059d4.bin
ab9a82862a84c601273b5ece7471d8a3fbc841f75f0cdcc25f4264592a89a291
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D4 5348 bytes
font_01_sfnt_off00006c00.bin
e82703dc9857a97e36b4e8aef25e88f0b6ded084821d336ade55bee83577bdd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 9968 bytes