Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efc168c592af36d…

MALICIOUS

PDF

44.0 KB Created: 2020-11-02 12:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f98fabbfe080a5e58a91db77b727354a SHA-1: b83985417aba3e30f2b0d74cf00179f198fdd273 SHA-256: 6efc168c592af36d3d5e2f226054598776c0a80ab77f7169b2e5601fa5010102
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that appears to be the same redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or phishing.

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=zero+sugar+cookbook+recipes In PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/1029375.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/996ee2bf21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezetega/81276884525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0647/4420/files/rational_expression_worksheet_multiplying_and_dividing_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/81115553941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/duke_men_s_basketball_schedule_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/bunker_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8586/6165/files/personality_psychology_twenge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7647/6828/files/vewusuzajenexazazivix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8709/4461/files/unblocked_raft_wars_hacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/33746642436.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/wedding_cake_art_and_design.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/honda_gx340_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8193/9144/files/strategic_management_formulation_implementation__control.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/vekinadijaxexapo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 5232 bytes
SHA-256: cbf9915902986828095dc7cb8157e21f67f1f5d7bd97cc8a3a3d49c41c3e00c0
font_01_sfnt_off00007d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 10940 bytes
SHA-256: 7ff40c7bdd2ff699a7587b139383397985ced32a68ec5a0129283946d376306b

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