Malicious PDF — malware analysis report

Static analysis result for SHA-256 845589a6af95f6f5…

MALICIOUS

PDF

49.4 KB Created: 2020-10-30 16:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: b55b2b440582c7111eb342c28e129987 SHA-1: 32b57934bf616743405a9f2cfcc10217d1bc5f20 SHA-256: 845589a6af95f6f56e6aa363db589f3b1cb1af25124ac94fbe5b61b852fd2211
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.link/123?keyword=can%2527t+kill+the+rooster+song In PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/1070381.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008235.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008235.bin)
    • https://cdn.shopify.com/s/files/1/0430/7451/9191/files/48519403609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2178/6031/files/nitewisidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2762/7676/files/weaving_it_together_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/20299990911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db6a3c5-417f-4167-90e2-b139ede06912/73026940139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21facde9-03fd-4141-9654-e5b8e971233d/lakukekuzabotifebodafosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4450b7b7-c735-48e2-9359-4cd2bbcdd522/figepijozupulefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4665/2062/files/cisco_ise_2.6_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2766/8381/files/algas_marinhas_calcrias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4589/8408/files/gafozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d265d69b-4385-4a7e-961a-edc194f5b80c/sawumudedutidugosum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac9e614-90b8-4bd3-ad8f-4d957c34e104/nerexivosasezukese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5926/4669/files/ximufadabuxej.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 extracted file (font_00_sfnt_off00008235.bin)

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8235 4948 bytes
SHA-256: 2b2d7bda4b2fef8d66ddf21f85ebf2254064efe49caa6ba2352529bc746a8175
font_01_sfnt_off00009309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 11364 bytes
SHA-256: c7277edda88a58a1a801f1a4b761a1dff8de99fdcef07bd932f23fd796bffd19

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