Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8ab18ed9db87b2…

MALICIOUS

PDF

44.4 KB Created: 2020-10-19 20:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b0d77ecaba585474984ea3970d0af388 SHA-1: 25359c5e19321694b115156e7662d668ba622f50 SHA-256: cf8ab18ed9db87b2598bca9487685e9195709a0184afd14e253ac48c2331d66f
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/pify?keyword=manual+air+pump+for+car+tires In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/5041229.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/puzezowapijewaduk.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/katemofiseturoj_lakagez_kunajomeba_tajofe.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/xekuniposi.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/d820ef2cf6d4.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/4995441.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/4347983.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/1/0479/2955/7148/files/jafesukekurenujolimuzoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1102/3270/files/bagagagowevewizosoparifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8880/5533/files/7z_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e13c940-f29d-448f-9b00-7e9a2dbe787d/rozikozutuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb94541-f764-4eb0-ba58-7e971d3e4e4d/61052080462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4429dd-2304-45ae-9284-57cadaa3336b/xuvapawitafuwezabup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b98ef1b-f97b-4cac-9b9f-660833511ac5/2843692770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42efdf7-a173-4e8c-9d09-410a59efc597/rarozugetiluvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6636/7399/files/leather_sewing_machine_for_sale_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4975/3493/files/windows_10_hipaa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4447/2485/files/you_drive_me_crazy_lyrics_shakin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7050/0263/files/what_does_dw_mean_slang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0234/9733/files/heater_core_cleaner_napa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0879/0175/files/91539610099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3783/6710/files/always_discreet_samples_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/cse_341_lehigh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8681/4109/files/dogaraluxejoduzunas.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_off00006ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 5168 bytes
SHA-256: f2c26e7efa38bc5b21f3549198e1d658b7f3ed614de681fd6a38297e310f2473
font_01_sfnt_off00008036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8036 10696 bytes
SHA-256: aaf8f06449a180915d42f3135a66b774f697de606871005f6cdde8451d7639c0