Malicious PDF — malware analysis report

Static analysis result for SHA-256 9472989104c47c79…

MALICIOUS

PDF

45.3 KB Created: 2020-11-01 21:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 696ed99a1de89158e68a9a4889c6f2d5 SHA-1: 76f90dd6118252ceb4d858e130b202f68e24dc32 SHA-256: 9472989104c47c79089ba1d04ffbe6e9198f792b678ee7784436e9130c9d4b32
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=letter+school+app'. Additionally, it features a large number of embedded links, many of which are likely part of a link farm. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to disguise the malicious link within seemingly innocuous text.

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://gettraff.ru/aws?keyword=letter+school+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_5f9e848682959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3293/5078/files/gupenoteva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2903/6199/files/64066231819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8799/6089/files/bivepija.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/72262601192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/kitomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6832/6042/files/charkhi_dadri_mid-air_collision.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7409/0671/files/intrusion_detection_and_prevention_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5415/0044/files/hdmi_to_component_converter_adapter_best_buy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2889/6674/files/cobra_baffler_xl_irons_release_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3108/0345/files/51539885455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4903/3114/files/89037177950.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 4596 bytes
SHA-256: d45508e89964c1b44266cc009f55c1fdbe2e972bde06a22309de5db9a637ccf7
font_01_sfnt_off0000764c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 10676 bytes
SHA-256: 9426089376b63e97b9e1b60f9032a4b5db5d2b9f04e54d5cada968c2df0a05f6
font_02_sfnt_off00009a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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