Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cc1dc555ad7091…

MALICIOUS

PDF

50.3 KB Created: 2020-08-26 03:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: adddadceab06fc0fca7d15b53d81f1d4 SHA-1: 7da814785204705ec6e14e306a4df9f9c8ca6ade SHA-256: f4cc1dc555ad709129361f861e40ef17e3870247486dee215c240bfde01be8ca
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=o+codigo+bro+pdf+download+gratis%253D In PDF document text
    • http://files.adamflath.com/uploads/1/3/0/8/130814432/2347615.pdfIn PDF document text
    • http://files.mypeakpractice.com/uploads/1/3/1/4/131437535/9217561.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/1/0429/1241/5907/files/36387918111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/lupe_fiasco_superstar_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/cch_dch_file_sang_ting_vit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3077/1869/files/axis_bank_credit_card_dispute_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/lizipexavideviloku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/walexufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1868/8424/files/reporte_de_cedula_perdida_republica_dominicana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/71004270711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/git_merge_squash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/essential_human_virology_louten.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_off00007897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 5628 bytes
SHA-256: c87089de13bded2b3516c2e0b79896093e8f554f9841cea32a4f223d8799a73f
font_01_sfnt_off00008bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD3 15592 bytes
SHA-256: b61f136180e2de1d6a36fd628980b21c18e32c5b003aa18f805d467d2931b639