Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2e7751e746f55d…

MALICIOUS

PDF

66.3 KB Created: 2020-10-24 11:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 511edfbb6f22070c0ab2a1a3938c1048 SHA-1: 6e2365bff136ba3e4a126580d227dd62460c9365 SHA-256: 6b2e7751e746f55d1c904e703710e257e0587ec426061164360a2e91e653146e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/123?keyword=l%2527oreal+paris+preference+hair+colour+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f89c6311bc18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8eb03ee75c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_5f93561bf18cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5f92a6b7a0c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5f9320fe0b6ff.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/1/0436/1220/9309/files/comprehensive_handbook_obstetrics_and_gynecology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/37564233167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7088/4514/files/35348470765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8650/1806/files/insulin_resistance_thesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/kelipiwetamotomexivofa.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/80656475204.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/3d_shapes_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/speak_english_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/dofebotaforibafosimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/protocolo_definitivo_para_acabar_com_herpes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/1508570576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0544/3233/files/server_proxy_menolak_sambungan_pada_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b6f60a0-b3f8-410f-9076-13928cab7b11/bejobegojurixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b138a92-300f-45d3-bc6c-20d76ead95d4/79629219348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6badaa88-0295-4d9a-9b1a-72455c4b7650/dekalifopokaladu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e81708-3028-42bb-81d8-01740354ee34/zemibajizogigibokajifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa988d47-4f4c-41a8-ac58-3df58756a302/zaxesofijavoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4542d097-c0dc-4f06-a631-57907fbbef7d/82903810981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3065c8-6621-4d72-ba36-377d754e2453/17527880364.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2E 2972 bytes
SHA-256: 9793a380b729feb17a365fdf1d1ec3e1178d09cbe9a53933e56fd7d1d69685aa
font_01_sfnt_off0000c4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D9 5076 bytes
SHA-256: 2cbae133b8f62e5d697fdf911ee653efe31c0af81337763b82265c21c5584394
font_02_sfnt_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 10212 bytes
SHA-256: cfe3383a8a697ad7cae27eded267b48fc4fc7f36d040df62fbcc4dd1028c7eba