Malicious PDF — malware analysis report

Static analysis result for SHA-256 c752149d5e47e478…

MALICIOUS

PDF

44.0 KB Created: 2020-10-27 17:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: aea126f4761ee23e48712331c79af55b SHA-1: f0d01b3d8d688c51dda6a4363733ccf80ba85301 SHA-256: c752149d5e47e4785fae2c36eaca4fa1ac2a0215aab3d6ae3f44e307f45f6e1b
202 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.link/123?keyword=strike+force+3+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f9264f56abc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f97e7d3d3205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f96d254535b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f90074b5b0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87186ae9983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f933171cb876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f982b25c1d08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f88bb197ea0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005def.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005def.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009529.bin)
    • https://uploads.strikinglycdn.com/files/59f96a5e-1994-44c7-ae6f-e8816b4cccac/tabla_de_clasificacion_de_los_aceros_segun_astm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bbde6f-052e-4f9a-9002-ba24e2dafcc9/signifie_avoir_un_compte_bancaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadb4cf9-0e15-4b34-8d11-f5c33835ac98/lanugakibove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a88fb5-d707-4713-821d-9ad8f82eb2e4/wiloposukokorimabutajefez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1717bc8-fe12-48e5-ae45-ba5600663622/wamodolajurawogogaxomufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/evil_eye_plus_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7038/9924/files/fenoxalum.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/natotora.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/dadotavurinagilevadevoxu.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_off00005def.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 5048 bytes
SHA-256: 90b99e2d6e767d14134b143557f83400962db8b5d4c4a021985c03ac88be3c06
font_01_sfnt_off00006f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 11212 bytes
SHA-256: 00282e14ee858551563f9e53472296f83f7ed3c3137bd58f1d21691841983964
font_02_sfnt_off00009529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9529 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2