Malicious PDF — malware analysis report

Static analysis result for SHA-256 98af46e6419ce0cc…

MALICIOUS

PDF

43.9 KB Created: 2020-10-30 18:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aa8a4828d91a264277cce43a4c377732 SHA-1: fa5bf6bcd246bc6bde88cd02dd7a5fae279bb924 SHA-256: 98af46e6419ce0cc4014381a1bf8b11f05bdb49eda89d22d0ba4bb8c63a19c13
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://ggtraff.ru/pify?keyword=equipment+for+ultimate+frisbee In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f91772ecfa97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5f92862c2740f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86fa356f75b.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/93b51577.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/4359148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f8840b3aaeeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f97990d5fae4.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/1/0496/4037/4428/files/ziwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5805/5318/files/dozukakap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8040/0030/files/98409014766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9799/7471/files/xiletusijorar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8158/9432/files/temuwewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3534/4034/files/58583878832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4622/7096/files/woderolikegi.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_off00006ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAD 5268 bytes
SHA-256: 40e10d6a5ad99c8cc7d2879e91eff2c218e131d847098768bf7f078b4292bdec
font_01_sfnt_off00008085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8085 10028 bytes
SHA-256: 6c6ee51d8a1233efb408d12e92defaa6ac7227e8bbdfc26c9f6f63d72d56455d