Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f0ef6b45edb967…

MALICIOUS

PDF

37.7 KB Created: 2020-08-14 19:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1845d6d06bd62f73fd6aba7e1459f05 SHA-1: c3d1617c58875e7d57fc436ad78e37dd96b7585b SHA-256: 19f0ef6b45edb967c95426f10d567dbd3e30d29c059819e64a57d0971dacfa51
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wb?keyword=klasifikasi%20turbinaria%20sp%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link within the document.

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.ru/wb?keyword=klasifikasi%20turbinaria%20sp%20pdf
    • http://files.solvingminds.com/uploads/1/3/1/3/131397973/tetafutiv_totovule_towirufefurasul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/81441511115.pdf
    • https://cdn.shopify.com/s/files/1/0449/5081/4888/files/rewrite_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/17852914343.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/wusotaten.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/fodumukakibebogojurad.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/cakewalk_pro_audio_9._03_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/2824/9767/files/daily_creative_writing_prompts_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/kebaredebizil.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/fezijugasovusotavufok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/danovopotikidemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/rufuwefulejuv.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_off000055f0.bin
eec4041c0fd6e8cd8cb8aeeb82b25be0809e691edbafda1d59793a4d8d8c51ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F0 5208 bytes
font_01_sfnt_off000067a1.bin
e0e8f399819832e7a83ded8c76fe930f4a9d22817d0cfe531359ae0f755fab59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A1 10072 bytes

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