Malicious PDF — malware analysis report

Static analysis result for SHA-256 a779dc2cedfbfe0f…

MALICIOUS

PDF

46.0 KB Created: 2020-11-04 11:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 97a8b85d66276f60041a94f78061d878 SHA-1: 5157b14d9655210e767be9e4266eefda9f8b4a6b SHA-256: a779dc2cedfbfe0f78b63797d43d4d16c2a84cf811b09f7dc48aa8d5f502fe68
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=fulton+county+warrants+for+arrest In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f87644557120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5f8d3347a918f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5f9ec1ace2819.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/xirebakuxevafetesa.pdfIn PDF document text
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/3104738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f89045278801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f8d8ec2ece94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8f6683c1cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f977825a13b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/63e09122-db3d-48e9-9e61-a2e5ce2040ec/tadanalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7144d7-9b9f-42f8-9bab-287747e3c943/fetasolifixefoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682e6c86-8ccf-4fd6-9432-992205dec5db/56646371662.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B43 4860 bytes
SHA-256: b2395827e0fe470a702535d24eeb6e163ddf6a681aa2d71f68c7a37bde6c44a2
font_01_sfnt_off00007bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BED 9756 bytes
SHA-256: 095bf579b819c8860d278a05ac792e9b4da162c5751999cacb5e552ac94d70f3
font_02_sfnt_off00009d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D32 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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