Malicious PDF — malware analysis report

Static analysis result for SHA-256 af260ee48d78e4c5…

MALICIOUS

PDF

34.6 KB Created: 2020-10-05 13:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cc2a67fee40c8334d5b00a2f8f8332a1 SHA-1: 89bb2c5b823ff2372dc292e4150f508af01a63a5 SHA-256: af260ee48d78e4c52fdaf56cfcd60dd3abe5d4e061eda975c1ba963c1593975a
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.club/pify?keyword=therapeutic+exercise+foundations+and+techniques+pdf In PDF document text
    • https://site-1043809.mozfiles.com/files/1043809/fineva.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/gutumafutevijatokibarotus.pdfIn PDF document text
    • https://site-1039341.mozfiles.com/files/1039341/31011245127.pdfIn PDF document text
    • http://files.hurstjhband.org/uploads/1/3/1/4/131454024/jixanidovezeribijon.pdfIn PDF document text
    • http://files.childsafefence.com/uploads/1/3/1/4/131483036/86f4a743b16b7.pdfIn PDF document text
    • http://gasagog.therawbeautyproject.com/uploads/1/3/0/7/130738705/a28e8db293a4e.pdfIn PDF document text
    • http://files.warriorsofpurpose.org/uploads/1/3/1/3/131383330/7617328.pdfIn PDF document text
    • http://files.kitmetlen.com/uploads/1/3/2/8/132815123/f948158c.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/fcdeac7f-414e-4721-a489-685bcc4e1753/sosejir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c53a7ba9-7d6d-4887-995d-e12b494405da/30166789434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecbf18bd-1359-4255-bbeb-5d907003e624/70114050228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/paring_knife_definition_and_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2933/4685/files/what_is_life_a_guide_to_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/47955223157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6353/6535/files/62758229241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6397/1492/files/fufegud.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_off000048df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DF 5356 bytes
SHA-256: 23912b16c39f67fb8bc6d3ec40819905d440e73411774a585510e728bdec8d4d
font_01_sfnt_off00005b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0B 10004 bytes
SHA-256: a82725b27971c39132d6b4f6e4a90e61bf002f27348e0a82190de8e3fe8dd0ec

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