Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2bcae0020880f1…

MALICIOUS

PDF

43.5 KB Created: 2020-07-16 01:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 446db955e6ac62cb756e3f4c93567e8f SHA-1: 3b3e372533ab0e0b27cadc500ceacf430ebcd9e2 SHA-256: ca2bcae0020880f1aaccb6e50f59fd4e10df7169b195cd9640efaa8ebf3a90ac
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Kerala ministers and their departments'. 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=kerala%20ministers%20and%20their%20departments%20in%20malayalam%20pdf In PDF document text
    • http://files.pollyreid.co.uk/uploads/1/3/0/8/130873791/1837094.pdfIn PDF document text
    • http://files.sdcandidateforgovernor2018.com/uploads/1/3/2/7/132710694/9483bd07f53.pdfIn PDF document text
    • http://files.joelwapnick.com/uploads/1/3/1/4/131483031/vigaz-dukobugedoni.pdfIn PDF document text
    • http://files.tucniagara.com/uploads/1/3/0/7/130740033/58967e0.pdfIn PDF document text
    • http://files.cannononlinemarketing.com/uploads/1/3/2/6/132681576/5339904.pdfIn PDF document text
    • http://files.janetmancini.net/uploads/1/3/1/3/131383889/zipetinen.pdfIn PDF document text
    • http://files.fbcoflizton.com/uploads/1/3/0/7/130776008/9005822.pdfIn PDF document text
    • http://files.q72spiceco.com/uploads/1/3/2/6/132695418/ritiwex_faseb_karuxisaxebusat.pdfIn PDF document text
    • http://files.passagesandpathways.com/uploads/1/3/2/6/132695629/wufiruxinajod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gopafidinut.files.wordpress.com/2020/07/95497098588.pdfIn PDF document text
    • https://mijitesedi486084253.files.wordpress.com/2020/07/jivobexofe.pdfIn PDF document text
    • https://webijanuz.files.wordpress.com/2020/07/62112943785.pdfIn PDF document text
    • https://kusapituxola.files.wordpress.com/2020/06/35704041588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/jevoxapofikobove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kazapuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/14081766178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/60457878159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zotogobujadafozafinuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/81952769424.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_off00006cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBA 5028 bytes
SHA-256: bfd947def0d149d4d754165c754e518b4f0802bccc7a6e222e8c206d35c081d8
font_01_sfnt_off00007d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9E 10100 bytes
SHA-256: 00262d2f627125a1fdec564da63ca1610508223c3f92e6eb980b50badd73f214