Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4459086cba407c…

MALICIOUS

PDF

49.6 KB Created: 2020-09-30 20:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ec4f392b4eb26ab7604f4b6a3dd7ed32 SHA-1: 6281863b19478b9e2aa5d37e911e91f1922fd905 SHA-256: 2c4459086cba407ce07cb48658558a5282329cb5a3cc1950c0108d5a793deeb0
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://gettraff.ru/strik?keyword=factors+that+promote+effective+communication+pdf In PDF document text
    • http://files.myonlinecreative.com/uploads/1/3/0/8/130813859/6760626.pdfIn PDF document text
    • http://files.taycarpetinstall.com/uploads/1/3/0/9/130969742/6363042.pdfIn PDF document text
    • http://files.dcigym.com/uploads/1/3/1/3/131379439/liladebafit.pdfIn PDF document text
    • http://fepuwijo.auroramay.ca/uploads/1/3/1/3/131379685/117c8b97.pdfIn PDF document text
    • http://wogep.bsakoaks.com/uploads/1/3/0/8/130814328/7431479.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/ec684470-04d6-43ee-bfec-94cbbce74954/murojezuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9324fe-8ea9-43c0-90b0-8f47a65759ef/89186177895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5018e172-e63a-4292-82f6-6b7cecf6d311/peresemirasekukolubunatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/filiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/kupepunefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/javascript_get_window_width.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4874/7687/files/marathi_barakhadi_chart_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8705/9362/files/60572363027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/xirugupetupodufel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/battalion_609_full_movie_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2000/1178/files/free_ancestry_family_tree_template.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_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 5380 bytes
SHA-256: d35f35e09bd71cbdc77e3e0b5baf8b0729f0275901b8535d75b498ab9f1dc24f
font_01_sfnt_off00009407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9407 10828 bytes
SHA-256: 673a0c9abfa513c14b98bfe6d678b14839536d62410568bd2c8e87eed2f3197f

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