Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8bf6558aa7f1e1…

MALICIOUS

PDF

45.0 KB Created: 2020-10-29 02:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f688c61cf54253bf31da9f28cf972825 SHA-1: 278ed08c00708bd521b93b0e4a9c6ad24e4b38f5 SHA-256: 2e8bf6558aa7f1e18030eae63dfcf0707be9e384ef0589862781fcd023d5ac24
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various platforms, including disposable ones. The primary redirector URL, 'https://ggtraff.ru/wb?keyword=wuthering%20heights%20litcharts%20pdf', is flagged as malicious. This indicates a likely attempt to lure users to malicious content or to engage in SEO manipulation for malicious purposes.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/wb?keyword=wuthering%20heights%20litcharts%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5f971328ab629.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/6270435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8fdaee6ee3a.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8755fb0be2a.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/9530c843211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f8c9d61d1b9b.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/4274632.pdfIn PDF document text
    • https://towotoguwulij.weebly.com/uploads/1/3/4/4/134482006/rolalo_lakupefokuvo_sukakuje.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/506c5e.pdfIn PDF document text
    • https://pumewigegokofav.weebly.com/uploads/1/3/4/3/134317234/zojimagerowij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5f96779e97e26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8935/3622/files/97543553079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0837a8ae-80c6-4a09-a652-b809a89dd301/88978744902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9789/2031/files/buwavovukozifuwin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e785f788-cf83-4e2e-9426-2adf96096d66/tefeduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9849/8981/files/port_washington_high_school_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b545d39-bd45-4ee3-9607-7370ce3dc9d7/jakesatudavosakejifesuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/4682688334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f98b66-cfe1-4ed5-b910-da7981b9d8a0/71782898033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84ce1f4-90d4-4978-8fa6-29f6046ca122/lagala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f89003-e4f8-494b-ba65-701e99564b73/96158819208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ee93a7-77aa-4c2a-855e-036149f374be/sacrificing_families_abrego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036aacab-6f41-4cba-88ee-4fd938e249ad/19844955971.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 5432 bytes
SHA-256: f715eb10aa2db5192bb7b2d98995c6c1221e571c6a30894f6590c0d0d551b881
font_01_sfnt_off0000849e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849E 9952 bytes
SHA-256: fd2ebbef5b4f48784c3747b429dd807ff28a49194c2f515a0628803c22cd6382