Malicious PDF — malware analysis report

Static analysis result for SHA-256 7765d6d3dd3bf74a…

MALICIOUS

PDF

44.5 KB Created: 2020-10-17 14:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 34ae5de3f610e565622fe306f53b4a33 SHA-1: 33cd6dc890dec2f6ed7b500d5fc9911fd81ede85 SHA-256: 7765d6d3dd3bf74aba3d4ad65cd34980a94ea748417a1568e051a9874be0d145
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/123?keyword=history+of+pascal+programming+language+pdf In PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/6760510.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/kodikisogate.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/latew.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/616a32b3f9aa22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8aa6a790325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f88f6cba4452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f88604bdfb94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f89b5ebf372a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8715d499ac5.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c35.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c35.bin)
    • https://cdn.shopify.com/s/files/1/0497/9697/2708/files/gubufuwanipiwaxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7727/0425/files/cisa_review_manual_26th_edition_by_isaca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/5e_mold_earth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/bodamabaxufuguwewomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/25791781661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/arclight_cinemas_pasadena_telephone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3589/7251/files/ranifol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4426/5366/files/bones_season_12_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9376/3251/files/super_smash_flash_2_google_sites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1732/9566/files/printable_label_body_parts_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/8305/1431/files/the_golden_truth_tag_team_finisher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876af501-1fca-4950-ba8c-928901ef604a/8474128886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd071b74-a373-486f-9eeb-18779bdc0538/kajaduvozigo.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_off00006c35.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 5536 bytes
SHA-256: 9a336eaef34378605940236621bd4059e33234d4d171475b3866555eea500d84
font_01_sfnt_off00007ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF1 10500 bytes
SHA-256: f0b4544454c070c20201c7afd33b7b6b3f3fc8a55770e71400d819af0d5f868b