Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcd674cf262f10b…

MALICIOUS

PDF

63.3 KB Created: 2020-10-17 06:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d07cddb5cbf8bf112ff089f1cec61edf SHA-1: 59f65cf087fe44bd69187fda53faeeef39a00dc9 SHA-256: 9fcd674cf262f10b84dd6c7414ee28516b8e9bef6e3eb186ec22e558377d5d76
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files hosted on numerous disposable domains. This behavior is indicative of a link farm, likely used for SEO manipulation or to distribute further malicious content. The presence of a link to known malicious redirector infrastructure further supports a malicious intent.

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://gettraff.ru/123?keyword=jewelry+appraisal+template+pdf In PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/fubivotaxidipa.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/3274198.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/meladuv-jawalutepo.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc456183-1bff-4090-8685-d912ac32433f/21982785761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b0e04a-0d20-454d-b363-943f61bc96a1/nuvaregumonariv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819add84-98a4-4b56-913e-9360d130cc7b/nofuluxitat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec392a8-e1ee-4c5d-a258-96343681f98e/54007834677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c962fa1-2a47-4f1a-aeb0-924948fc14c8/guboxojeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d620840c-8e55-4ab0-915e-22d3f0ab457c/77758151155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c80bc5-f71a-45db-9922-cc307dcdf371/tisejelatenovilifovejeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f17b70d-3dbe-4957-885e-dd6c451ff4d8/27252838911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb8f9dd-49d6-435b-ae09-416a44ffa7e7/91768853861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e12aa4-7dcb-4f55-af47-4741b18ffbec/gononojobut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b59a8e-5390-4330-88b0-2c6a72f53b0c/71421712258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1d3b7c-0491-4d73-b4b2-6db1f3a9e399/nelazoruligomepiparupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c28591-f6d8-4eca-a280-41f7492c19bc/3280701724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/por_esto_de_quintana_roo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9271/4685/files/analisis_de_procesos_tecnologicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5471/8880/files/25386726351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/besaxuvidorebukumu.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_off0000ba70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA70 5372 bytes
SHA-256: 0d4348ff184675eb368a32e926514a6d0765be0063a046d1b3e78d9fffc3320d
font_01_sfnt_off0000ccb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB5 10272 bytes
SHA-256: 5523e133156aa4f964c02b55a34733930f65bde4f8198f7bfd85a045269928c2