Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c92fdda6b9c207…

MALICIOUS

PDF

44.4 KB Created: 2020-07-23 03:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5b88572d42d26e30c8b383135513ab8e SHA-1: 08f480bca14886b1e686c369c3d3a8adace53a07 SHA-256: 86c92fdda6b9c207ca077d91b778b3f52f52a509f66032804ed7195d1d7fddbe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'ethical altruism'. The primary malicious URL identified is https://ttraff.com/wb?keyword=ethical%20altruism%20pdf, which is likely used to redirect users to a phishing or malware-hosting site.

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/wb?keyword=ethical%20altruism%20pdf In PDF document text
    • http://files.fotsga.com/uploads/1/3/0/8/130814411/155b35a1.pdfIn PDF document text
    • http://files.jameswolverton.com/uploads/1/3/0/7/130775734/maguzog-bubirizeror-rogijinegeg-bawurod.pdfIn PDF document text
    • http://files.literallyanythingmovies.com/uploads/1/3/0/8/130813841/pizavoru.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/1/0432/1479/9012/files/jovegene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/wajosofumikid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/24736283613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/21979308137.pdfIn PDF document text
    • https://wovuvel596308806.files.wordpress.com/2020/07/kuxewudipef.pdfIn PDF document text
    • https://zadevexidag.files.wordpress.com/2020/07/wijupivavilivokulomi.pdfIn PDF document text
    • https://dadikopur.files.wordpress.com/2020/07/xedegepepeb.pdfIn PDF document text
    • https://ladubine.files.wordpress.com/2020/06/51253893359.pdfIn PDF document text
    • https://xupafib.files.wordpress.com/2020/06/61417469185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/nogifetevuwafanufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/73728324182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/jukapuzedevuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/41664868884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/30607933039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/65354671290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3531/1775/files/79145693424.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_off0000711a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 4900 bytes
SHA-256: 30f602738b885e1182e253872f311a5a89a26f57a1503be0ff8afed2bb2664d9
font_01_sfnt_off000081b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 10420 bytes
SHA-256: 047df174d809d32fc0d3b458ede8c1e42b816d4a761200296c92c9031be53937