Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf524f3cf15a0a5…

MALICIOUS

PDF

43.0 KB Created: 2020-10-07 18:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 602226a80639800c2c226c252c6de69a SHA-1: b6f0618fc752df31e86afbdaf5758ee3dc5fb944 SHA-256: abf524f3cf15a0a58f7bee4d66369e419ce8cf39deaf72aba40b97402aabf079
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/strik?keyword=marie+lu+legend+pdf In PDF document text
    • http://vabekonu.rairsymposium.com/uploads/1/3/0/7/130775878/jerivomexu_jifusupeta.pdfIn PDF document text
    • http://files.qkebler.com/uploads/1/3/1/3/131380619/117cc7748a.pdfIn PDF document text
    • http://milumuf.convivenciaconsultancy.com/uploads/1/3/0/8/130873826/bawatifis.pdfIn PDF document text
    • http://feraz.samaacollection.com/uploads/1/3/0/8/130873915/4799684.pdfIn PDF document text
    • http://nabibor.perfectlg.org/uploads/1/3/0/9/130969916/vedetoluvi.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/6a2a64c3-0cf9-44b1-b9a0-c39cd669fb5f/norosogexijariwipiserim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42948a9-84c7-40c9-a643-ada87ed0a9a1/2804397545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bea7e2-30d6-4446-9e63-cb7a773ba7b4/49047430686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfa4aa4-1dcb-45de-8a42-e882b5948cc4/19875859477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55fdb4d-5791-48b6-938a-b9802ad45885/62365773277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8546/6267/files/lesson_4.3_practice_a_congruent_triangles_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2821/8019/files/24649189775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5465/2822/files/teluri.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_off00006b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 5036 bytes
SHA-256: 426147359d0fd45f19a5630bd81570c068976241b322cf07baae2a248d05452b
font_01_sfnt_off00007c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C75 10496 bytes
SHA-256: bbf0996c96982c8f6c37690ae58b88ca155231a45614c49c4126d67a4c067274

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