Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e61961564cd50d2…

MALICIOUS

PDF

44.2 KB Created: 2020-10-27 14:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f9d09b8321ee58209d887da9e5395f6f SHA-1: f5e3889c2e707dbb5d3512d275a419faaa0d3926 SHA-256: 7e61961564cd50d2f13ae41d04f18b0975ded64c7535aeab97eb692a61c06658
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://cctraff.ru/123?keyword=nra+990+tax+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_5f8ccf3a6fa6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f8e997f1b4d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f8b3470c8f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f875f0385d45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f930c945ddac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87237aec490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f874013e4014.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006df0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006df0.bin)
    • https://cdn.shopify.com/s/files/1/0437/7693/4042/files/dirty_deeds_band_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4717/2269/files/fidumis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/rejajaruxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5654/3944/files/va_dmv_drivers_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/vigiketirajutowowidodaral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/bigafajexalozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9509/files/jipazufiler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/bawovafelusurakeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2625/0389/files/73370445543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2511/2477/files/protein_synthesis_worksheet_5_mutations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0615/4692/files/65580293568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9903/6058/files/52502839235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8e889b-7945-4600-a91e-5f5d46ad0c23/96982189975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7593c7ca-add9-4d58-af7c-0cd59ef9e6d6/87767460060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6875740-b037-4ed9-87f8-8c203d7ac834/nugupekaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c242c959-bf53-4b89-a7be-fbd934e528f7/8798588222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e558e44-e58b-4224-b8f0-70a3f3534bcb/wukemiseduk.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 extracted file (font_00_sfnt_off00006df0.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF0 5036 bytes
SHA-256: 8897f1b50c1baec01db19610a31a95adc527a53bd0de354cda241aa703bab2a9
font_01_sfnt_off00007f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F03 10656 bytes
SHA-256: ad71daca748a82df1d5dbeb5eaee2d7f7280ffacff1d1a3c46352022e30e7d00