Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30586692ab28371…

MALICIOUS

PDF

40.6 KB Created: 2020-11-02 12:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b0cebe29c8991852081ce905cbd2dda9 SHA-1: ee9cf2b07bf980eb627b90849bbbc6463b256b47 SHA-256: d30586692ab28371af762690d2b32628e1d68ced59975038ce15ec89d63de402
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many of which point to a redirector service that in turn leads to other PDF files. The primary malicious link, 'https://cctraff.ru/pify?keyword=super+mario+star+scramble+unblocked', is identified as a malicious redirector. This suggests the document is part of an SEO link farm or phishing campaign designed to drive traffic to malicious sites or distribute further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://cctraff.ru/pify?keyword=super+mario+star+scramble+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f8e0a579aeb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f9fcc1653f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8b09d6710a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_5f938efe79931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f87b3d2a5496.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/14317579-4683-4f5e-9b35-4efa666c033c/pukiruguxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7461654-c138-46e5-b1f2-b068a7d9b2b4/pexexerorol.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/87729370598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6761/1571/files/peptic_ulcer_guideline_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9098f564-9b97-4af1-ace5-7fe0207ce8d9/50159706182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816d06ea-c831-4822-a122-620475ed70b8/pelalataderaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b216356b-3620-4c0c-b799-6deb8b1430c2/tabla_z_estadistica_nivel_de_confian.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/boland_college_application_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8180/2945/files/meaning_of_logos_ethos_pathos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8669/9432/files/kotlin_vs_java_in_android_development.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E68 5528 bytes
SHA-256: afd2df07da994b5dc8b8f5691e10d48a91c9d77b3ca1c741ee0dd48e560bf389
font_01_sfnt_off00006102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_02_sfnt_off000070e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E2 10612 bytes
SHA-256: 3a718bb79744b73a7ed5dd28e3937c7963728dde0a153da0529d62596568d2e2