Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc65a43252a1d997…

MALICIOUS

PDF

40.7 KB Created: 2020-09-01 11:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1eacff9f8ebf1ca35845d5ce2c75600e SHA-1: 67e22c3546865ed0f814e4b8432c7046e2f2c653 SHA-256: cc65a43252a1d997a080835a589dba94799cd2e7d2d17433b4a6eca5512884b3
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.com/wix?keyword=corrugated+sheet+feeder+plant In 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/1/0428/9835/8432/files/45292738862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/12707070898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/33579952706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0803/2669/files/conference_registration_form_template_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8300/5094/files/how_to_answer_what_drives_you_question.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/983629078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/39795783675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/91511306808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/23762299898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/hamilton_beach_76606za_smooth_touc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5726/7359/files/microsoft_office_365_administration_inside_out_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/google_books_upload.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/1346/5254/files/45376583025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1062/8511/files/campbell_biology_concepts_and_connections_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/motokilibaledapodid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/git_upstream_branch.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_off00006293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 5208 bytes
SHA-256: b37e5bac8eba6d36444e81c8f1029b02ed3053fcd7f9c8e14b4bfe3ea6ef00f0
font_01_sfnt_off00007447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7447 10064 bytes
SHA-256: 8fad0ceb17ad7a03202fed575c16d9e7716d114c3d0185790be679b4d72433b8

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