Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fa20eea3ac525e…

MALICIOUS

PDF

55.9 KB Created: 2020-07-10 02:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7340544381f84320135dbe2564b95c45 SHA-1: 4e10a9944c154ea6a8c6d3ad3f5696b38e4b8bd3 SHA-256: 67fa20eea3ac525e69a861f8cf7a6f9605b03f552a30fd792e4db5494fb3b4d2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary link, 'https://ttraff.com/wb?keyword=nios%20lesson%20plan%20science%20in%20english%20pdf', is flagged as a malicious redirector. The document's content, disguised as a lesson plan, combined with the numerous links, suggests a link farm or redirection tactic to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=nios%20lesson%20plan%20science%20in%20english%20pdf
    • http://files.irvingtonfbla.org/uploads/1/3/1/3/131380901/6091119.pdf
    • http://files.uprisingstarsinc.org/uploads/1/3/1/3/131379045/gowofikur.pdf
    • http://files.jlizjewelrynmore.com/uploads/1/3/0/9/130969884/fawuseg.pdf
    • http://files.susmanosextendidasmexico.com/uploads/1/3/2/8/132814067/xotigonilova-fisav-rapimeg-bibise.pdf
    • http://files.luciebaker.com/uploads/1/3/0/7/130740438/4837212.pdf
    • http://files.novelsf.com/uploads/1/3/1/4/131483550/mataxopawowojuvuba.pdf
    • http://files.hubertmccormack.com/uploads/1/3/2/6/132695903/5710154.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.hopesfavoritethings.com/uploads/1/3/1/3/131382141/gurakezixikelo.pdf
    • http://files.thebody-mechanics.com/uploads/1/3/0/7/130775752/rajodawudezete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://fusewolaj.files.wordpress.com/2020/06/69755643909.pdf
    • https://lisovituju.files.wordpress.com/2020/07/77061798388.pdf
    • https://dabozovu.files.wordpress.com/2020/07/29081202935.pdf
    • https://miruziburofu.files.wordpress.com/2020/06/3222325061.pdf
    • https://larifite.files.wordpress.com/2020/06/15053953661.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75877947267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aab.bin
9a7089a6f5ef2b19e0fac70f3cc3b4882a9ad5284c4cc9795550841171c81980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 5000 bytes
font_01_sfnt_off00007b9b.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 3720 bytes
font_02_sfnt_off000086fe.bin
4f04fd156047937fad43bd96015cc085b7f4178bef2f0bcf0b197896e669f343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 13240 bytes
font_03_sfnt_off0000afc4.bin
5b7eda3f03042cac4598d7d261a4aa0330a68cba40856e76ec91a6b061a4f7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC4 10752 bytes

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