Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c52a363d17ff45…

MALICIOUS

PDF

39.8 KB Created: 2020-10-17 03:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5459ecf1e57080b3bee5c711fd729998 SHA-1: 1111ad7f16606d592cca17574b3fb79f59d84165 SHA-256: 28c52a363d17ff4543acaa0b9587dbe18e6cc332eb72349ea1591253a28c585e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous embedded URLs that redirect to malicious sites. The primary URL identified, https://cctraff.ru/strik?keyword=polaroid+iex29+manual, is flagged as malicious. The document's structure and the high number of external links suggest an attempt to distribute malware or lead users to phishing pages.

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://cctraff.ru/strik?keyword=polaroid+iex29+manual In PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/465734190fe0.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ratefunerod.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/supafawodes.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/d6878b181861e0.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/7268132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f86ffb8d0ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8700ec65967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f88c5700d9be.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/ludizabok.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/jogeruxaduxa.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/4367980.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/f2895.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/275d94f7-2671-45e0-9c4d-80b1d12a62c8/figasabejejanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45eda3c-8b33-4624-8b99-37743e3f847f/64936241565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c061575b-eff2-42d9-bccc-fb561cb7d1a0/33946869045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0130/2168/files/mortal_kombat_x_apk_mod_2.1.1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1911/4952/files/mejufuleliva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/63249172542.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_off00005cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 5152 bytes
SHA-256: b3eea3717e0935481242cf422583e3e0abae487ecb4c9d24aecd25b82b74d7b1
font_01_sfnt_off00006e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E36 10608 bytes
SHA-256: a4165da512d4dde4592c0ef4d0ebb2962083b51d29a27bd456b85d7ebf3b960b

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