Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf95bb7fa4bfde29…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 17:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c11286752403fd348aecf60e743c7d2b SHA-1: 4198404ee5ddabcce7472634d35913a13cedbde4 SHA-256: cf95bb7fa4bfde2963aed2da2aa3f8e961b777935ccde729921fa6045ac60d5a
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Cat 2020 question paper pdf download' and the malicious URL itself, suggesting a lure to trick users into downloading potentially harmful content. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of outbound links, further supporting the malicious intent.

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.com/pify?keyword=cat+2020+question+paper+pdf+download
    • http://files.frachetti.com/uploads/1/3/1/3/131380467/zufufaladiru-lafanujojoleto-wogoduganex.pdf
    • http://files.anydogildorescue.org/uploads/1/3/1/3/131384300/lesodemodexag_woforad.pdf
    • http://files.natashasteer.com/uploads/1/3/1/4/131437953/6248808.pdf
    • http://files.lawrencevilleroofingco.com/uploads/1/3/0/8/130874299/fanogiribozidij-jalofuximip.pdf
    • http://files.natashasteer.com/uploads/1/3/
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/acidemias_organicas_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/zotupegosikejasemop.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/90138643898.pdf
    • https://cdn.shopify.com/s/files/1/0450/0792/9508/files/basic_accounting_interview_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/39561044324.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/61011507415.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/leaf_dragon_hide_rotmg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6570/4599/files/xogumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/xugizusofetusezuguxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/ragewafimatoli.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/doctor_strange_hd_online.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_off000069b1.bin
0363f40fbc989536f71a764a5ca463f5e46d361624fe5b535a4e5a8f166716e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 5432 bytes
font_01_sfnt_off00007c41.bin
ef9cbecfcb18c2cc297199b4deb22bb526c4d0d6cb6626f5ba8a3db5f78c0054
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C41 9828 bytes