Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f047620249e704d…

MALICIOUS

PDF

61.5 KB Created: 2020-09-08 07:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5536cdb061518b8f5e27a63c6cd25040 SHA-1: d6663716ad49c5298c212a5b0b6896dbcc4077c4 SHA-256: 1f047620249e704d9011aa4a07fbee69d177da3ffa81cf86521782a79e9a4088
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 infrastructure, specifically 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent. No scripts were extracted, but the malicious link is the primary indicator of compromise.

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.club/pify?keyword=report+format+essay+spm+2017 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_56a2082fa5534f109682c165d8792389.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1be480_df111d76849f41c9aa5424878624e375.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c250_c0b7ba79caa7442bb31d0121574228d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8cbfce_24280ce3c14d43ac88a5ec9974feb3d2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0224/6814/files/cpp_binary_search_tree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6407/3128/files/purabefokad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/wosomimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/responsibility_accounting_reports_for_profit_centers.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e8e253_2a56cf3c86f342b18cbac995131e94ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f241d9_748d02a52b4b44439f7338665c80682d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/95360139700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/vowemowesim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7778/0134/files/boomerang_app_free.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_off0000b352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB352 5528 bytes
SHA-256: ef3bacf423d5858a9c51065542ae4f11141e733a6276a29f44b50ec39e11b762
font_01_sfnt_off0000c623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC623 10456 bytes
SHA-256: a7067e48183daf94afd7b52b8ca9c91573466abc7c929b63ac5e3061beedd522

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