Malicious PDF — malware analysis report

Static analysis result for SHA-256 656cb9e46c772ce1…

MALICIOUS

PDF

50.1 KB Created: 2020-08-01 07:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a941e687f511e620e1d44b65b2aea27b SHA-1: 3a52b92d775878ac6f81f31a149a681dc6fa96af SHA-256: 656cb9e46c772ce103605b583e0bd8e8bf5d969f18e01d1f9212e6b3ea5db6f4
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=minecraft+equestria+map In PDF document text
    • http://files.veronicawolfeartist.com/uploads/1/3/0/8/130813859/towego.pdfIn PDF document text
    • http://files.cutofnova.org/uploads/1/3/1/3/131379761/xegukuwusak_fepivavamere_wasajisive.pdfIn PDF document text
    • http://files.gigglesngreetings.com/uploads/1/3/0/9/130969966/lijetomigenek.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/1/0431/0269/9681/files/mufasafiviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/juwururazuwuxiziwivaxozuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/neleximorowunekudaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/85377265027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/japawivesulajebeloxidiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/65624901831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/bezelipamukup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/82756970111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/32200044922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/86939345824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/rigefelafaroxotimurupot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/33957203724.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_off00008691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8691 5260 bytes
SHA-256: a8ff45c1f2b675834b7ff821c6f1788d14a432674975926cfb7d5a7a67cde225
font_01_sfnt_off00009871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9871 10172 bytes
SHA-256: d90d85c5359addc35e4de754dffccb20c21d2f7f27235095cfce5fbe8bcc65d2

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