Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9d0f362156369b…

MALICIOUS

PDF

71.9 KB Created: 2020-08-21 12:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc5a1a6c2fa3010807ab27fb0edebb5b SHA-1: 52842517de5a4dd64baf7f2c11f2c826faa1091e SHA-256: 6c9d0f362156369b52379a6506f52a837066a9d0137704ea352bb6dad304744f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the text 'Nclex midwifery questions and answers pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=nclex+midwifery+questions+and+answers+pdf
    • http://files.runningfatchef.com/uploads/1/3/0/7/130776277/fufojune.pdf
    • http://toronifot.beautifuljourneybirthservices.com/uploads/1/3/1/4/131407552/gebakuv-bajepigexovut.pdf
    • http://vipufibuw.nicolejamesphoto.com/uploads/1/3/0/7/130738943/vujaluwarimubu_jusov_kefixoxeja.pdf
    • http://fokopirab.65rosesracing.org/uploads/1/3/1/4/131482992/3121625.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/56507654126.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/95560464513.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/faxebunazapigasisitij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/35834534489.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/player_owned_ports_guide.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/knee_meniscus_tear_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/beatless_light_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/beechcraft_king_air_200_poh.pdf
    • https://cdn.shopify.com/s/files/1/0463/0960/5541/files/61784264767.pdf
    • https://cdn.shopify.com/s/files/1/0434/0446/0188/files/green_belt_course.pdf
    • https://cdn.shopify.com/s/files/1/0440/7663/0181/files/49616941626.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/jaradisodixukogiduga.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/59442973560.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/meeseva_sc_caste_application_form.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e4.bin
cadb9660ce4ea5c11918a50cd401e5db93bc79c7666ab5b66dd717eadf891c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 5656 bytes
font_01_sfnt_off0000eb27.bin
8f0ef89256e52a4c3ec32666581093989fc0c1cecce676808a4f01e2467a29d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 12000 bytes

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