Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f4d7c9f08bc759…

MALICIOUS

PDF

44.7 KB Created: 2020-10-30 14:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 72d910dbabf595e60f3138b81bbaf888 SHA-1: 2df496ab58dbee7c3ad02576869211a93580506a SHA-256: b7f4d7c9f08bc75944e016ae4df0f66f4952327a5be9573100a90325b3c6a400
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=medical+marijuana+persuasive+essay+outline In PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/9477668.pdfIn PDF document text
    • https://dutedurelixuvu.weebly.com/uploads/1/3/4/3/134320021/9893fe4edf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5086/4287/files/contemporary_world_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/63403236340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc21a428-bdc9-46cb-85c5-16a527e451cc/jakukopakexolemabemopavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39f9258-481f-47d5-ac86-3813b26ef794/babepunir.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/drogas_anticonvulsivantes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6f247b-0c08-4118-a089-748b08d319b7/que_es_un_elemento_representativo.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/53995904572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5247/2764/files/modern_organisation_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/embroidery_thread_conversion_chart.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_off00006298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6298 5344 bytes
SHA-256: f6cc97410246a004b6c624592df652e053a9592ae7b04a5f2fd85baba6f9cc97
font_01_sfnt_off000074b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B9 10436 bytes
SHA-256: 6ad8d344a70a9966db902868bb082797f3c712fe32c24023051f320a6e21e3f4
font_02_sfnt_off000097e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f