Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bedfc2df991f33…

MALICIOUS

PDF

51.7 KB Created: 2020-08-03 01:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 217716233104581fc4afd54e2f4b2867 SHA-1: b0eeb3a6beb0b288b4943b450c8b97d3a85c6fc1 SHA-256: 17bedfc2df991f33e6672caec36ba1f73447a8365b1d9c966899e5e9d48a6592
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=8th+grade+constitution+test In PDF document text
    • http://files.carolynbridgetkennedy.com/uploads/1/3/0/7/130739212/jevuzinagitini.pdfIn PDF document text
    • http://files.folkystrumstrum.com/uploads/1/3/2/7/132740270/poboze-diworisan-kejufetamule.pdfIn PDF document text
    • http://files.tastefulvoyages.com/uploads/1/3/2/6/132695832/668cc250b1.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/1/0438/0449/1937/files/50048515585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0980/9318/files/pentagon_9_11_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/67063095728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/26839941042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/13130787192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/pusomojekagepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/16017455853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/53154653036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/47475203688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/trovi_remove_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/xadukipotitina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/33627692156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/dagujisororasaxela.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_off00008b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B74 5268 bytes
SHA-256: 052b3cbc580829c70c84d0ffad37356928c2dabadf270a4d2d451c2b06f2a949
font_01_sfnt_off00009d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4C 10616 bytes
SHA-256: 63dcae5eb6c97b0aee69ecda37ed46d003380189aca541d7dcbf3b333cad8c84

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