Malicious PDF — malware analysis report

Static analysis result for SHA-256 547d85d96d5de689…

MALICIOUS

PDF

38.4 KB Created: 2020-07-08 18:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdaaf1c142ae0c93d937b6a26334d940 SHA-1: e9b7a411d11ec07d389a0a166284dbbcd4e50d8b SHA-256: 547d85d96d5de689d5fccea04a19fb39a036616beb9d001b4acdb47810cfafa5
150 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of embedded links, a technique often employed for SEO poisoning and redirecting users to malicious sites. The document body, while containing a seemingly educational title, is primarily a vehicle for these numerous external links. The heuristic firings confirm the presence of a malicious redirector link and a link farm, indicating a strong intent to drive traffic to potentially harmful destinations.

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.cc/wb?keyword=states%20of%20matter%20practice%20worksheet%202nd%20grade
    • http://files.toodarnhaute.com/uploads/1/3/0/8/130873973/c5523fd0916134f.pdf
    • http://files.thewarriorlady.com/uploads/1/3/1/6/131606631/7633542.pdf
    • http://files.statementzine.com/uploads/1/3/1/3/131398281/duvumiba_telulotax.pdf
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdf
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdf
    • http://files.michaelbruley.com/uploads/1/3/1/4/131453837/borodizi.pdf
    • http://files.prettynpoised.com/uploads/1/3/1/4/131452806/gegisemowixe_revejobegijokup_weliwatisul.pdf
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdf
    • http://files.goodchoiceinstituteinc.com/uploads/1/3/0/7/130738562/7a791.pdf
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • http://files.eleotinherbs.com/uploads/1/3/1/3/131379951/vizezezos.pdf
    • https://tejuxojove.files.wordpress.com/2020/07/92016786901.pdf
    • https://gubenop.files.wordpress.com/2020/06/dofomeso.pdf
    • https://koxebitiz.files.wordpress.com/2020/06/lexosuvinimujevu.pdf
    • https://lotosam.files.wordpress.com/2020/07/durelesa.pdf
    • https://xevabutifun.files.wordpress.com/2020/07/gepanewopimeloxupomibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.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_off000055de.bin
87bf6b6fbe9ad5c97313fa5e0796f51127bcdea5a53766325ae1022370ee13d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DE 5716 bytes
font_01_sfnt_off00006932.bin
dd19700c1e9c983074fa69c35654e0da674f555af395692083404ebe17fe9198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 10176 bytes

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