Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f701d7cf317ff0…

MALICIOUS

PDF

43.8 KB Created: 2020-10-30 10:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4f8cd90cd007d267155a8844efd81203 SHA-1: 17428a97c434cf9e227364c842749b3320925982 SHA-256: 62f701d7cf317ff0dc17aee2a931fc5c1cb203a2056f0d27c1d77984581cd8d8
94 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://cctraff.ru/aws?keyword=element+50+inch+tv+manual'. This URL is likely used to lure users into a phishing scheme or download further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document suggests an attempt to trick the user into clicking it, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/aws?keyword=element+50+inch+tv+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f885fb551a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f95d95561e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5f9918fb24cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f87574ac7daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f89b621e02c0.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://uploads.strikinglycdn.com/files/72f54bcb-f7fb-4e8b-922c-a3fb591bbc8f/45341603262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2910/0230/files/this_egg_shimmers_like_gold.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3683/8558/files/les_hirondelles_de_kaboul_rsum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6378/4637/files/delonghi_portable_ac_window_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7492/7774/files/age_of_empires_android_apk_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7640/9751/files/fisobazapesiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/765c45c7-9f4f-4054-a1b3-a732367b1801/teorias_cognitivas_del_aprendizaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2662/6718/files/vesenotetopafarisotav.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_off00005fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE2 4820 bytes
SHA-256: af155fe7f786cc76fa18d2cafac8bc3ac75be588dda8dc6b3ded2e7b2ecc750f
font_01_sfnt_off00007021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7021 10748 bytes
SHA-256: f2830405865fa0e91eeb423e6ad7f68c74c2adc0462721601429077061a6c1a5
font_02_sfnt_off000094bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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