Malicious PDF — malware analysis report

Static analysis result for SHA-256 874d50f7348627d1…

MALICIOUS

PDF

43.1 KB Created: 2020-08-26 00:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f210b93d269c901da00a9fe661de946c SHA-1: 6da16b7a5591481d43219cd49dbd3ffd20b72800 SHA-256: 874d50f7348627d1168d008a515a09bf6994179cb2a2b80bb6c2c48b90b446f7
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/pify?keyword=download+xpadder+5.7+windows+7 In PDF document text
    • http://files.audreynewmont.net/uploads/1/3/0/9/130969878/98466edbfb.pdfIn PDF document text
    • http://files.reroutedmusic.com/uploads/1/3/1/6/131606293/7367904.pdfIn PDF document text
    • http://files.asrpci.org/uploads/1/3/0/7/130740323/9559721.pdfIn PDF document text
    • http://luvebuwix.righttaxes.ca/uploads/1/3/1/4/131408017/jigike-linawemivu-susunejim.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/1/0430/5872/5015/files/38472296867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/5417382649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/retroarch_best_cores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/zodekutufolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/dukofamuforebamaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/bears_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/39131017390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/the_power_of_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/vafuzufeguvanaxosiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/g_shock_watch_instructions_3403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/netogerobomovoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/cisco_lab_exercises.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_off00006881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6881 5348 bytes
SHA-256: b6d8f29d6b0fe9dcd7a000699fcb42067746ad6d54cb02813cd6c181467a7988
font_01_sfnt_off00007ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 10904 bytes
SHA-256: 6a3520cf3bd0d3185a64651ceddc1f51f1a031e1e51b6b6ddcb70862bafd2737

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