Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5cd19a72a174f4…

MALICIOUS

PDF

54.9 KB Created: 2020-08-09 04:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: db350700556b493bd2ed5f5d641d4e79 SHA-1: b50d0d98a96349f5ff463decb921a1d98ffb3039 SHA-256: 7f5cd19a72a174f43ab1018f38865bae9fe522843eee683598c1a9425cf1e92c
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.com/pify?keyword=the+autobiography+of+abraham+lincoln+pdf In PDF document text
    • http://files.ccmooresville.com/uploads/1/3/2/3/132303013/4673815.pdfIn PDF document text
    • http://files.charliebrownslaseredgifts.com/uploads/1/3/2/3/132303118/1a053.pdfIn PDF document text
    • http://files.colleenshaunawaters.com/uploads/1/3/1/1/131163684/eb9bd4b4.pdfIn PDF document text
    • http://files.elishiareynolds.com/uploads/1/3/1/3/131379296/jamiwewakoxa-fuxopuxubobutut-rebegidovokosig.pdfIn PDF document text
    • http://files.johnmallonhistoricalnovelist.com/uploads/1/3/0/7/130739542/pugoxikiv.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/1/0431/5352/2850/files/20220740752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/national_drilling_association.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/cape_town_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7023/4519/files/73960666288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/blaise_cendrars_l_or.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/65243359253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/28783786063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/laruwilonew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/68711748904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/11591596796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1480/7974/files/bogafiwevopusijoteno.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_off00009702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9702 5584 bytes
SHA-256: 2f0aa383c6c7779731c649d1e99219b31c5eef991a20628888d8788d9e1e30b4
font_01_sfnt_off0000a9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DD 10124 bytes
SHA-256: a429c027bcf12e7d7f5b0db91906fd24d3d393b6c80d7412fca58a7386d12f00

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