Malicious PDF — malware analysis report

Static analysis result for SHA-256 243a81485d72b413…

MALICIOUS

PDF

43.2 KB Created: 2020-10-18 06:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b33808a68971e137de33c06fbefab92f SHA-1: b0178fcfa80a3c980cc4738cce83653889c88c81 SHA-256: 243a81485d72b4134438afafc1709808cfac1ea089ee1e54bb90c0ff61025ff8
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.me/123?keyword=citizen+watch+setting+instructions+h820 In PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/bba779d3d76e.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/wamemewewu.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/8838600.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/bazag.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/7414141.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/9704689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f35ab76-d5be-459f-a6bd-63376b74a807/gijoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5904d6fd-fc11-4c09-8b53-836999f4c7ff/bowajevugemejek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3012/1112/files/bodexakidafowepijazakodok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/7941974486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8235/9994/files/xogiketufasegujanozimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7934/0710/files/fepifiponobupividonakot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8172/7142/files/nedukiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7565/6097/files/we_buy_used_hydroponic_equipment_denver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8786/2429/files/33872842626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4664/7446/files/woxomumokevena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8669/4550/files/3_32_drill_bit_screw_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/factorization_of_quadratic_polynomials_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4090/5669/files/okanogan_valley_guide_service_facebook.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_off00006b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8A 5544 bytes
SHA-256: 96185840a290217d583c917c3e2f6e7d1f7e6535d38424f1300c07eaf2bda77a
font_01_sfnt_off00007e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E73 9640 bytes
SHA-256: aecffcd360e086f0184854757a46f1412d5dee32340c4b6e8e07d1a484bd231a

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