Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a28a3e6af9913a4…

MALICIOUS

PDF

42.6 KB Created: 2020-09-02 05:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1065b5fd68e72a38326d9eddbb32745 SHA-1: e621e353f998cebfab259d593acfeb319dbd21cf SHA-256: 8a28a3e6af9913a471bca24688efc91dbbcf344e36e42f3da5227c0f10e7ccd5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link to 'ttraff.ru', which is likely used to serve further malicious content. Additionally, it hosts a large number of benign-looking PDF files on Shopify, potentially as a SEO link farm to mask malicious activity. The document body contains a call-to-action phrase, reinforcing the lure to click the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=html+form+file+upload+progress+bar
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/35178133782.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/past_present_future_perfect_tense_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/training_checklist_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/rozonut.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/95119657631.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/dijezilit.pdf
    • https://static.usrfiles.com/ugd/defcb2_e6f7627d12ff45a0bda8f19da5f9f9a9.pdf
    • https://static.usrfiles.com/ugd/735189_77bca9d0cb1f42cf94175a4029ea419d.pdf
    • https://static.usrfiles.com/ugd/ca32a8_b583e9bb9f084c87a20d37e4aa12a751.pdf
    • https://static.usrfiles.com/ugd/3e9e83_fe2145cc7c874a01b1d2c318fc43374e.pdf
    • https://static.usrfiles.com/ugd/63f22d_1fc3e84790034a04aa93cdc05d7330f8.pdf
    • https://cdn.shopify.com/s/files/1/0441/0304/1176/files/english_spelling_rules.pdf
    • https://cdn.shopify.com/s/files/1/0434/9788/1766/files/question_answers_of_history_class_9th.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c18.bin
37d9a787bca468a1d6c31e214706a3c89bb67790f91e7250c89f78ac6c3eb8a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C18 5464 bytes
font_01_sfnt_off00006e8b.bin
2406db95889dd5a38a5dcbb8d3b806b7b0d425dc215930d626238d0bcbedf33d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8B 15040 bytes

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