Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a33fa5a2d273def…

MALICIOUS

PDF

37.6 KB Created: 2020-08-27 17:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc295427e012383413edd55649ae8c84 SHA-1: 9b482b1028d7c3abc79d57b32de16fbf4ddd9518 SHA-256: 4a33fa5a2d273def99015dd1e8062b07f7852f65d9401f067c3bf1dfe8466273
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.cc/pify?keyword=e-commerce+2019+business+technology In PDF document text
    • http://safikotu.lensdefender.com/uploads/1/3/0/9/130969306/7550932.pdfIn PDF document text
    • http://kidid.camdenfencingclub.org/uploads/1/3/1/1/131163590/6016982.pdfIn PDF document text
    • http://xobuge.edgeglobalsupply.com/uploads/1/3/0/8/130813528/safipiti.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/1/0432/0319/9138/files/kinematic_equations_for_non_uniform_acceleration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/jegoxoduligepilofuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3692/6112/files/pufugijibaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/41902848048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/alter_ego_a1_livre_de_l_lve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/sukotarep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1596/8680/files/architectural_design_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/sekiro_ending_guide_spoiler_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/john_paul_jackson_dream_dictionary.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_off0000476d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x476D 5596 bytes
SHA-256: 0b4ce8ad7dc35075be6b97bd0ddba03a30a78c3ee14498a3a96abd3638a03597
font_01_sfnt_off00005a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A55 9824 bytes
SHA-256: 767242781611710dd3c62e15a32b6d8c1f7bac672bfcb63804c5186160d8b68f
font_02_sfnt_off00007b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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