Malicious PDF — malware analysis report

Static analysis result for SHA-256 97432855c39dda88…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 15:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70231ccc73e777d4541f0e4c2f919f3a SHA-1: 257ccc53c368a45d6851a3f448c1d321b9c230a0 SHA-256: 97432855c39dda8804cf46c09613e35c8a72096739ec3b4cb177dbef7bcb198e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link that redirects to malicious infrastructure, disguised as an IELTS reading answer sheet. This indicates a phishing or social engineering attempt to lure the user to a harmful site. The PDF also hosts a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or to obscure the ultimate destination.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=british+council+ielts+reading+answer+sheet+pdf
    • http://files.richardsonlightshow.com/uploads/1/3/1/6/131607440/ridozitukudag-nasekuwapibik-jekederada-dazurolabi.pdf
    • http://files.visualeyeslove.com/uploads/1/3/1/6/131637529/litogawoduweje_jepomuvurigepa_gibesej_gevizanofutupaf.pdf
    • http://files.peachmountainorganics.com/uploads/1/3/1/4/131437225/nijetarezosinixir.pdf
    • http://files.laparliere.com/uploads/1/3/1/3/131379543/075efe27fbb0.pdf
    • http://vebovo.thebeckeffect.com/uploads/1/3/1/4/131453177/fa1a62085.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/xevamitekir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8262/files/63382734877.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/54622758332.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/desuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/bobemiwumegovelalipef.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/attestation_de_fin_de_formation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/munixo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/sabesetumimigusimutojib.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/24978445131.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f52.bin
254f288b3ca98873162f8888dde0fc0a6577cd7720b6058b110c51c5466a389e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F52 5556 bytes
font_01_sfnt_off0000824c.bin
ead965226d35b87d49fe9b72afdbc3faf5a8fae9565a7760bd92e5f6768f8f9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 10412 bytes

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