Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeaaeeff847274d…

MALICIOUS

PDF

50.2 KB Created: 2020-08-26 21:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4b71be0d252f01a6d75d6b31cc33cd47 SHA-1: 219cc359345dc7d5092e4c0966b7eb4e0232c946 SHA-256: 9eeaaeeff847274d9b5b7b241f952858b3ba01dd00a9e682673057b14b1cdb09
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/pify?keyword=amd+a8+speed In PDF document text
    • http://files.fhva.org/uploads/1/3/1/4/131437308/wapukemog.pdfIn PDF document text
    • http://files.torontogreekdj.com/uploads/1/3/1/8/131859993/mazek_rawirubifupar_fepotasol.pdfIn PDF document text
    • http://files.westafrica-aviator.com/uploads/1/3/0/9/130968947/a700a6888e4e.pdfIn PDF document text
    • http://files.casswomack.com/uploads/1/3/1/1/131164399/0f868daa08bdc20.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/1/0433/7916/3285/files/6246717355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9617/files/52741686906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/pirifibowibasas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/whole_circle_bearing_and_quadrantal_bearing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/badland_brawl_hack_apk_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/suwibagixovavaxekawuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5101/4551/files/vabejefavozipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9465/0535/files/meditations_in_an_emergency_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/how_to_learn_computer_security.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/15921084493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/69210379806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.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_off000085c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C9 5160 bytes
SHA-256: f44f5e002ad98b29142c39fa99af1de5642b8e63fde1af0fd9d5f0ac8923fd66
font_01_sfnt_off00009741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9741 10772 bytes
SHA-256: f22fe74d5f329ecc0deb058d538b14b4264b0fb44fbbc130d3617a30185f001b

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