Malicious PDF — malware analysis report

Static analysis result for SHA-256 d949e038ce826671…

MALICIOUS

PDF

42.0 KB Created: 2020-11-01 15:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b534f16e92dfef819f677abe8c3d2f47 SHA-1: e24eb8f6a46c6fb0f05b4845232efe3b5dec6a00 SHA-256: d949e038ce82667118adb320b35e15e9255e911a2463b8a410a4c39e676cbc09
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=playmobil+castle+1997 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f89cd0419bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f914401c8e70.pdfIn PDF document text
    • https://vobemebu.weebly.com/uploads/1/3/4/3/134383317/3725544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f9da5398f368.pdfIn PDF document text
    • https://xagixuruzetel.weebly.com/uploads/1/3/4/3/134319769/bb2865d9a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f967c64e8358.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/gukaserixolepevozetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5f9cbf27e1337.pdfIn PDF document text
    • https://zajefepitav.weebly.com/uploads/1/3/4/2/134266194/sofunil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f926217e6312.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/1/0428/3950/7100/files/31611320241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1028/2439/files/characteristics_of_bacteria_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7215/7349/files/root_master_apk_7.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7712da-1aa6-41ec-b55d-1febf962c38c/12783458969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7415/1083/files/femitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9599/3754/files/jijojuxipalanobirakisodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185b5286-b946-4be8-95b2-19f2236bcc47/dagejixanaximeduvixuwuru.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_off00006452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 5380 bytes
SHA-256: a89765557a26930cfb74d95a4f4540e22f109dacb34c7d44990d892b063d08c3
font_01_sfnt_off000076a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A0 10752 bytes
SHA-256: a531cf1d09dff156fb6f653d3404cd0a0567731906f818e6591f24a16ed31a7e

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