Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac7bc3384d2f228…

MALICIOUS

PDF

48.8 KB Created: 2020-10-25 18:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8044038bd9eb20d7ce89190ff340fa0b SHA-1: a1595e52894c2a98620b8ca43c8bd746e3b960ff SHA-256: 0ac7bc3384d2f228c923ca39c4d793ea95d5ecacb233ea68562720f300ff20da
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?keyword=seoul+metro+map+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f950d7ce69c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f8e2c2bb806f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f91c29d39225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f93b5c6008f4.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/vikezaruwiwat-dusike-tujuse-pogidomomab.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/logowuziseb.pdfIn PDF document text
    • https://mofivekirupu.weebly.com/uploads/1/3/2/7/132740685/5224065.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/6ea8b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f89a3bea58c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870f4addf52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f8dde62988b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8fb29d143f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f9064cb51003.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/3140673.pdfIn PDF document text
    • https://zarurirabug.weebly.com/uploads/1/3/4/3/134355130/4911096.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/6884910.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 extracted file (font_00_sfnt_off000066f0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000066f0.bin)
    • https://uploads.strikinglycdn.com/files/d4f4d5bf-96f7-474b-9692-e1b61712bf57/arapa_trke_szlk_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463b6d79-d9f7-4ed7-a4c3-6442f1c1e5fb/64899323741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e094e70a-a837-4811-8b40-ba2241ede982/50034173994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6bd3c87-a334-4846-b19d-7698aa54952e/62242439918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/ideal_gas_law_worksheet_chemfiesta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2599/7217/files/apple_ipad_user_guide_free_download.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 extracted file (font_00_sfnt_off000066f0.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00009e55.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00009e55.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 5204 bytes
SHA-256: f0065236a0339f59ddbf45724463a979c43fa6cc9ccb4215916b05e0d9499829
font_01_sfnt_off0000789e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 10912 bytes
SHA-256: bad742656666912c8ae2c7ba64f7e24aaf9678e5c6b2399433310298db0902cb
font_02_sfnt_off00009e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E55 16248 bytes
SHA-256: 9e020c854edd9d16e76d4d276d806d6ad9537766fc0f49e31c6b0dee74960295