Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3993e5e99c3600…

MALICIOUS

PDF

46.7 KB Created: 2020-08-26 00:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8fa296a7600e7aba8822569cf164b1b SHA-1: 82d184b7c9bfb51fa414d606cf81c894cb7ce3fe SHA-256: 2f3993e5e99c3600104743ca0298529aac8fa53d47101f0036a61588ca3c7aae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a large number of embedded links, many pointing to external PDFs. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.club/pify?keyword=mobile+canning+colorado'. The document body contains garbled text but also includes the redirector URL and references to 'wkhtmltopdf', suggesting it was generated programmatically. The presence of numerous Shopify-hosted PDF links indicates a potential SEO manipulation or content hosting strategy for malicious purposes.

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=mobile+canning+colorado
    • http://dilefin.cbdwholehealthshop.com/uploads/1/3/1/4/131406717/6850753.pdf
    • http://files.oxfordpard.com/uploads/1/3/0/8/130813645/wapox_lesunubomo_bepem.pdf
    • http://files.bethany-kalamazoo.org/uploads/1/3/0/7/130775001/siguwezegamow_fefukopu_lisovoxatog_fonemibizebi.pdf
    • http://files.dynamicdogclub.com/uploads/1/3/0/8/130874180/2b3ffac2bc.pdf
    • http://files.saneegypt.com/uploads/1/3/1/8/131871714/zekag-vanimamib-fonibim-xeligagez.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/simplex_5100_series_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/31098337025.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/l_theme_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/vogemone.pdf
    • https://cdn.shopify.com/s/files/1/0432/5054/8899/files/66916492822.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/sologaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/identifying_theme_worksheets_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/zoho_aptitude_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/24319801550.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/jalsha_movies_bollywood_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/video_from_facebook_add_on_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9319/files/c_string_library_functions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/filmora_video_editor_app.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d13.bin
4ab4e3240bbbd5fb2866d0b7b8358acc6b0d8806db0ebe316116afa1b7f36050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D13 4784 bytes
font_01_sfnt_off00007d4c.bin
984ef2f176721360bd08c7894088975b36973d52b6cce1dcc89c035412e8c406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4C 10108 bytes
font_02_sfnt_off00009ffa.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFA 4324 bytes

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