Malicious PDF — malware analysis report

Static analysis result for SHA-256 b679edb064aee559…

MALICIOUS

PDF

49.2 KB Created: 2020-10-30 20:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 44e9e926edc5ea3217b28ad8ae5f0eab SHA-1: 02e14b5e399d0eccccc766d2630566bc36ce24a2 SHA-256: b679edb064aee55996c3cfb1ec204e3c2253e26b28454466a7c71769d23c33a6
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=how+long+can+a+snail+live+without+sleeping+or+eating In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_5f946bb1efbf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f9bf2ba3ca4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0760b4e7-f9c2-4fd9-b98d-746a39733b99/pistachio_crusted_salmon_kosher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3146/0538/files/organizational_structure_of_company.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6556/9180/files/ruforalag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a25852-c323-42e3-a49b-3046c7b9d726/fomeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0728/1832/files/ultimate_screen_rotation_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0462/4548/files/21929272939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7f850c-0765-47ea-897b-0f1d5820715c/harry_potter_3_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3624/4643/files/81904382954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525b7d45-aecf-4d1f-bb34-be2ca8d1bd02/donusazori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d191678-b9ac-4110-aa72-56c4a6e8386a/lojoxemuvevafibidazuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/kudup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626709f9-550e-4726-8c80-d2cf5746adfe/53011726739.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_off0000811a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 5308 bytes
SHA-256: b3bd6c2e992fa70d32d8c3a40e9ee41a4d0423b1e51c2c94d03b3c95a289de0b
font_01_sfnt_off00009344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9344 10720 bytes
SHA-256: 0d79ab934e1e7f9c0d434ece20fe43e15feb3815a3db0d58d74c9ff1a194009b

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