Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ea2e6bc8b8d514…

MALICIOUS

PDF

48.7 KB Created: 2020-07-22 06:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 59a5227274bdfe788a7bf5077b8d01ff SHA-1: 2d99bdf7dcb0cbabbc7021de03b3f48d92daa7e2 SHA-256: 29ea2e6bc8b8d5140658bae5009ea351cfdfbe429abbf3d414ecd3bee0483820
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=mario%20kart%20monopoly%20gamer%20rules%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The primary malicious URL is likely used to redirect the user to a phishing page or a site hosting further malicious content. No scripts were extracted from this sample.

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.cc/wb?keyword=mario%20kart%20monopoly%20gamer%20rules%20pdf In PDF document text
    • http://files.ouhpsoc.org/uploads/1/3/1/3/131379381/votepakop_ladovivaz.pdfIn PDF document text
    • http://files.palmhouserecovery.com/uploads/1/3/1/3/131382226/33874c0ff225efb.pdfIn PDF document text
    • http://files.rachelbeyerdds.com/uploads/1/3/2/6/132681359/gimosadanunefadapog.pdfIn PDF document text
    • http://files.academiadeballetallegro.com/uploads/1/3/0/8/130873738/d6546e74f908.pdfIn PDF document text
    • http://files.i-designgroup.net/uploads/1/3/1/4/131453713/wepiregojilowe.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/1/0431/7573/9560/files/15171885255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5931/2800/files/41626313566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5882/2296/files/48720024576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdfIn PDF document text
    • https://kadipelo.files.wordpress.com/2020/06/3786316345.pdfIn PDF document text
    • https://fisamuxani.files.wordpress.com/2020/06/tiribad.pdfIn PDF document text
    • https://juparafotogo.files.wordpress.com/2020/07/xinovigunowokol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/wemukusuzeduguzurewixem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/73633779351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/zemewaliliwunegowotibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/ximipegali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/96305726789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/65922351792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/2737077687.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_off00007fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBC 5416 bytes
SHA-256: 3a7b8c51928b2d7a3d1026841749a3b61713eb1f88ce16ff357980d06beff775
font_01_sfnt_off0000921d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x921D 10156 bytes
SHA-256: 6dd4e5c42c0d2e36caa1359768afabca9eb91cc56eb1c29c6b303cb2db49a707