Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4e3e4988b8cf67…

MALICIOUS

PDF

47.1 KB Created: 2020-08-24 05:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f9b13a62e7becd10cc977b75e33d4e7 SHA-1: ce249e32a2818f65e2488862d381dc782bce00ec SHA-256: 9f4e3e4988b8cf67a5e36777c24b767f251a0c156b9ded2bb856896ba4cadf73
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a redirector at 'ttraff.ru'. This indicates a link farm or SEO spam campaign designed to drive traffic to potentially malicious sites. The primary heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of links to known malicious redirector infrastructure.

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.
  • 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.
  • 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=behringer+um2+manual+pdf
    • http://files.thebeatlestour.net/uploads/1/3/2/6/132681579/11d4bb.pdf
    • http://files.jinhui-mechanics.com/uploads/1/3/1/3/131383318/19d482.pdf
    • http://piwesugud.osifashions.com/uploads/1/3/2/6/132681352/66fa0fcb5.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/wexiduvuriwuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/candy_crush_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/intermediate_grammar_games_vk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2691/5239/files/salmon_fishing_report_on_sacramento_river_ca.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/sample_agreement_form_for_lending_money.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/ffxi_monk_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/jogatepinifupalapulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/1571518194.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3155/files/7097519067.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/xuguwemoxeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/bitovavelumixajasisejapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6422/1077/files/chauriko_chamro_churpi_full_song.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_off00007a25.bin
4cfcea6cd1911735f8eb4f4a8c7c4a1dc85b1e9d7e3084588ef618e52e9b9a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 5460 bytes
font_01_sfnt_off00008c86.bin
4688aee4a67e5193ffd7e0425526c62228f79ecc4cc87d9e782386d4be2f1255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 10480 bytes

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