Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77f7466323f207a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-20 22:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 20a0a1b88d2b1b7d4528e4c9efe0e130 SHA-1: 27791703d06b4618bac926a530bcb29d0562e3d8 SHA-256: f77f7466323f207a095b948c26dc12b66ca4ff51d9c0c99926f0b5c03058e8fa
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=kakad+aarti+lyrics+in+marathi+pdf In PDF document text
    • http://xeleke.sailabilitybatemansbay.com/uploads/1/3/2/6/132696067/e3894.pdfIn PDF document text
    • http://mojed.georgetownenvironmentalhistory.org/uploads/1/3/1/4/131406343/3239fd6c7.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/1/0431/3320/6682/files/35242514854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/25462033590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/33517818643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/56201445260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/pukiguxokidutase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3001/0273/files/apostrophes_for_possession_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/12588663357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/neck_and_upper_back_stretches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/settlement_agreement_and_release_california_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/juvowemu.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF4 5532 bytes
SHA-256: 566ecdea58883fc2056f399be3f32982a85a4121b05dc47519eb9dc12c14034e
font_01_sfnt_off00006e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E98 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off000079fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA 9704 bytes
SHA-256: bb7a4ab1f64c012c812468daa81c1f2cfe18fc6085c4da559b1cb8fb1fa69c10

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