Malicious PDF — malware analysis report

Static analysis result for SHA-256 8515ce3d53fa86c3…

MALICIOUS

PDF

48.8 KB Created: 2020-10-17 01:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85e8c61b0a9f509a2bd6fd2d5cf33129 SHA-1: 4c8416b10a49fca3f92843e45fda1b361213aa10 SHA-256: 8515ce3d53fa86c30b13515e2e30c2baee28b8f176c5f501048a01690f9e15e3
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=talking+to+your+spirit+guides In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f881c9149cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8753e8a6ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f8765a8aa8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f89f84eb4078.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5d6eb7.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/busikuditutapenus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8718afa5543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f877b8590bcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f8937df4fc1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87005e3a783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8754434c446.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/1/0483/5508/2403/files/tizusapadoxifijemovuperef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6637/9425/files/89101544873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09870981-0271-4562-bd34-8dea5d00ae6f/noxazaxodedolajotexapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43417119-31e9-4b94-b0ef-e697865168b9/wowanotufabirusegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad5464a7-86f1-4ca8-84a4-96bc6138f350/68211025964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b930b5e-0fc7-469b-a930-76d4f86731d5/392072594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6487/1062/files/samanasa_sbi_ifsc_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3692/4826/files/nugezewejosex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1108/2912/files/27922358844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9572/3683/files/rome_2_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/88969132304.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_off00007fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 5240 bytes
SHA-256: 3cc872688533eef0a2e9a4be6d21f45059cb5df0549d84ff6277947b12c3469d
font_01_sfnt_off00009191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9191 10752 bytes
SHA-256: b08d80dedfd13a58c93165745e717b49d1af90677334f7d54474883792b8f3a6