Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf95ab78610305d4…

MALICIOUS

PDF

38.6 KB Created: 2020-08-13 15:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ee9dd5bec88fd96de868ef1b393f69ce SHA-1: 2f0ba44953afecf423509ed5f017edc7f2193ce0 SHA-256: bf95ab78610305d4d17fe9aef36543d09f18c32700365f2280047c240c8f3c0c
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.ru/pify?keyword=fjalor+anglisht+shqip+pdf In PDF document text
    • http://dufenina.fjmministriesintl.com/uploads/1/3/0/7/130738732/c8cee72fc.pdfIn PDF document text
    • http://files.aussiesoffaithfarms.com/uploads/1/3/1/6/131606819/b77a40a2fcb.pdfIn PDF document text
    • http://kuginokan.creativempartners.com/uploads/1/3/1/4/131455069/fd919d57.pdfIn PDF document text
    • http://files.theleadersoftheheart.com/uploads/1/3/2/6/132695543/1b622ca751.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/1/0433/3414/0056/files/wild_magic_table_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/fotikegatorojiwabizivin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/zulirawanodafiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/bach_christmas_oratorio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4308/4705/files/zilulavup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/zupimobifobitodoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/18th_amendment_in_constitution_of_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/velocity_triangle_of_centrifugal_pump.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/nojorev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3967/8886/files/45111799557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/gisamawofado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/55517892789.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_off000056ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56AB 5460 bytes
SHA-256: 2100aeb3cb2b3248fd885897d0032e8dfd324420417f6ce3940d1539bcb14859
font_01_sfnt_off00006933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 10932 bytes
SHA-256: a11e6bf567b7eae5fcc04bd49bec8fb9e743e6969c62733223006714cddd670c

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