Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e11a9f5373905b…

MALICIOUS

PDF

68.0 KB Created: 2020-08-21 03:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fb59542dcb38c7c5d8a422edca6d4cc8 SHA-1: 37c3f7a45e1b40b5a0e30cee690563852de7c39b SHA-256: d8e11a9f5373905b6d2a6f1fbe838e1a5be20bd527f12010b0a6e0f1b754a455
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 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

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=invitation+card+templates+for+farewell+party In PDF document text
    • http://files.gvtrail.com/uploads/1/3/2/6/132681443/fba35caa8b86.pdfIn PDF document text
    • http://begut.beyondpinkaccessories.com/uploads/1/3/0/7/130738797/fudifoli-pupaxatesak.pdfIn PDF document text
    • http://files.tamsinlynes.co.uk/uploads/1/3/1/4/131406049/zerapokazat-kirobadaduv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/time_management_worksheet_for_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/32242642415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/xabibibesexeleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/bicipital_tendinitis_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/33639967855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/how_to_sync_iphone_to_itunes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/48914019410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/34120217057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3222/files/zafejerekakotofevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/gasulovefoperiradademur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/magic_photo_editors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0294/3899/files/dove_guided_bomb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC688 5492 bytes
SHA-256: ea0d53f05ae10a734a90e283dd406e4793d61747dce87a140cc5b67b09982342
font_01_sfnt_off0000d936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD936 12972 bytes
SHA-256: 6784ddabbf4ee835eec3379f83e1ebe6558cc2ff985724b07f69ca18d88ae5bb

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