Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa6d0f3ca09b95a…

MALICIOUS

PDF

42.6 KB Created: 2020-10-16 16:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8f31bc5869f49d548bd653809690e8ac SHA-1: ec7794387ba4103c0c97340459c56531ec8455f6 SHA-256: bfa6d0f3ca09b95a500a19665f1bb967ae58fce48d6d2b213b7d2b54afb9eda1
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.club/pify?keyword=best+family+computer+emulator+for+android In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/linurigaruxox.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/mutaribedusubu-xetuxisozepakit-xijaz-pivob.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/fatume.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/05d8e0.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/taduru-pibawod-xawitafawaz.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/6520032.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/4316678.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9837/3013/files/perkasie_elementary_school_district.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/72217074085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1746/9086/files/90837365737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/psecu_auto_loan_payoff_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2453/0594/files/zusixapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349fa05a-409e-4fb9-b68d-fc48514ab0c8/52038260065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5bcbb5-18e9-486a-807d-47ec8adde8b0/rejepozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8583/3410/files/sherman_silver_purchase_act_effect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8838/8514/files/90736465816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4890/6145/files/87529464034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7589/3918/files/22699242830.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_off0000677e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5452 bytes
SHA-256: c56cfa85d7c859005797c3bcd1002c46e2dc9cbb9119adab30177d0f0bb18f08
font_01_sfnt_off000079f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F7 10312 bytes
SHA-256: 03de7e8b04791d0ad771a099fa1245e793218c3556114e921bc62bbed14c4eae