Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9e3ebe6127411a…

MALICIOUS

PDF

44.5 KB Created: 2020-10-15 10:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 06f0041c823249f1bb0e654c5a7be5d1 SHA-1: d37c0388c63c4b13deb277b7782a7651b51b21b2 SHA-256: af9e3ebe6127411aafba88004e345306eab7108e1a79a88700812093d7a33fe7
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://gettraff.ru/pify?keyword=convertir+jpg+en+pdf+windows+10 In PDF document text
    • https://site-1042020.mozfiles.com/files/1042020/11294287590.pdfIn PDF document text
    • https://site-1042883.mozfiles.com/files/1042883/didizosufaraxexezipijop.pdfIn PDF document text
    • https://site-1040008.mozfiles.com/files/1040008/52534557245.pdfIn PDF document text
    • https://site-1040299.mozfiles.com/files/1040299/9516761171.pdfIn PDF document text
    • https://site-1038567.mozfiles.com/files/1038567/85117411703.pdfIn PDF document text
    • https://site-1038974.mozfiles.com/files/1038974/91282215153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f872fb880912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8709061448c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f87200e98983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f8770104c665.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/210815b6d.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/givibelimi.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/rorid_kuzijojawedemi_guvizeb_xajasip.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/1/0435/3264/8602/files/dodirakasupode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6927/8881/files/how_to_edit_photos_on_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5805/5318/files/4237413846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/glenn_middle_school_home_access_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1549/files/the_mole_concept_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9772/1506/files/51237528364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9953/6040/files/mcmi_iii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1353/6426/files/genenevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9752/0808/files/gerudotidim.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_off00006f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 5296 bytes
SHA-256: c1c6830d0a5784a348db34bdd08a501653b10350057855d6dbef8fdccccae59c
font_01_sfnt_off000081d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D7 10036 bytes
SHA-256: df9d054ee027ad3ec3ee55645860dfe1a54ae536329812be4a9ec618ad85ce83

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