Malicious PDF — malware analysis report

Static analysis result for SHA-256 54388efe9cc6d693…

MALICIOUS

PDF

45.6 KB Created: 2020-10-25 11:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 7e941335153694dcd3250b21ff60b045 SHA-1: edec052963715b03ec9ce4582ef1b9bc1220fc9a SHA-256: 54388efe9cc6d693353365b2dda2264af74548b938f1cec4c27b41aaa2a84864
194 Risk Score

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.
  • 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.
  • 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/aws?keyword=reacci%25C3%25B3n+antigeno+anticuerpo+pdf In PDF document text
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/mafiwosexukudif-zojezakokipuri-kemefo-davemobu.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/gutisibaguruga_jerezegoze_wexem_jugitepezewiri.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/tejareziwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f8e494d8a24a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5f911b0041a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f94cc0466555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f94a22f16f74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/motivations_for_imperialism_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/vidadizezagegafupulijejom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/muvekupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3092/8286/files/3477816191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8380990-de70-481e-b385-d69c62624fe4/nevazoxatexiwove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae77c70-3133-49d9-9ed3-103783f884f1/susosiner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c200d4-a296-48b2-83c6-9eaed71cfce3/16959100847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/manual_rotary_vegetable_slicer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7593/files/kekexipulozesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/hunter_irrigation_timer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/rovutevovekivudaxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4594/0128/files/ni_c3_b1a_con_mamadi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 5136 bytes
SHA-256: 97d68e67123514117609c45d51d62967405ba60eb3e9acad7dd0d381c14c3ef2
font_01_sfnt_off000074ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 11044 bytes
SHA-256: 6193b8f9d9a5de6fea2c72fe7d450aa9038568c2f530481398aa6003c59c642e
font_02_sfnt_off000098e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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