Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f2f2c7a6588238…

MALICIOUS

PDF

42.6 KB Created: 2020-09-02 20:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7eeb7be5a3c63ab209eeaf2c6ad9ce5 SHA-1: ffefa8e8dd81d8fe0e478fbc2beacf7b1f07b4ed SHA-256: 19f2f2c7a6588238006cb69dc4175fe8477860509d12b9a3068873b0f4c5d4a2
150 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 Shopify domains hosting seemingly benign PDFs, but the primary link directs to a known malicious redirector. This suggests a link farm strategy to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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.
  • 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.link/wix?keyword=lagu+andmesh+kamaleng+hanya+rindu+mp4
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/bacaan_sholat_muhammadiyah_dan_artinya.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1805/files/rewezujapizetotanotu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/27958372453.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/c_form_haryana.pdf
    • https://cdn.shopify.com/s/files/1/0462/1733/0842/files/juvosimeriresuwifemuwije.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2919/files/file_manager_app_for_android_tv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/62239417516.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5348/files/61507362752.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/wavoduvuralafem.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/xupedogafus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/michael_schoeffling_furniture.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/77439363850.pdf
    • https://cdn.shopify.com/s/files/1/0463/1288/2341/files/bloodstained_all_items_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/manual_apqp_segunda_edicion.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_off00004a0c.bin
274dc63a29ef18be909b453d9e2366e7e8f73583b2b28381d959fc05c0db5279
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0C 5568 bytes
font_01_sfnt_off00005ce4.bin
3953b541a0850fec88a258f828f92e417413104491db9378cd8d2d5c5652d711
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE4 9940 bytes
font_02_sfnt_off00007f0e.bin
31fd7df36e9874b13078e1f8d59e0f68e40363f82caf7afe93a73c311f351136
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0E 18448 bytes