Malicious PDF — malware analysis report

Static analysis result for SHA-256 6515b7b9d7af4ab2…

MALICIOUS

PDF

67.4 KB Created: 2020-10-28 11:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0998a166f935aa93071950c73ca48d59 SHA-1: 1982e03287fd1d0fa41497bd6bfb9ed05e56ba13 SHA-256: 6515b7b9d7af4ab266bfef7cba26aa3e571fc3011e502cd71d6eecdbe5ee587d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a link farm designed for SEO manipulation. One prominent link redirects to a malicious URL, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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.me/123?keyword=seth+klarman+margin+of+safety+pdf+free In PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://vigaziwow.weebly.com/uploads/1/3/4/3/134322068/nirozasavu.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/cafd48f4c622b.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/kuzovegozoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8f458a3967b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f90bb86dfff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f8aadeba171d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f8ee6fd9bd21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f8f0300375ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/wefobolaroliwizi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/industrial_ammonia_refrigeration_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/24522378987.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/sweet_dreams_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9172/7014/files/les_paul_junior_p90_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/nopuraxudujuvudodaxomax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7903/3518/files/31975005161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8207/9126/files/30gtn_carrier_chiller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/kukoraxonaxafip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8937/2329/files/android_vnc_server_apk_no_root.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF36 5724 bytes
SHA-256: 9ee611476035691b850ce120cef964a948691d6ecfd3370e9a9a1cbcd48888ee
font_01_sfnt_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 8260 bytes
SHA-256: 61bcf55a1f2f59bd38a2cfd6bfc051f5ccfa124d0ffa4248a4cf6490adefcc8e
font_02_sfnt_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 11628 bytes
SHA-256: cbff68801033e30065d4e89ee646610a7e7773e2f7d2fc9ba9768650c92cb09a

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