Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6b1642ae12f8f8…

MALICIOUS

PDF

50.1 KB Created: 2020-07-10 11:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6afa56f9d00e47447f7ef80d7a29f2df SHA-1: 029c41ef5312bb165817b6a2415d7637ad46a012 SHA-256: 6e6b1642ae12f8f8df5d2d94eb9f3737924bf0f58914d6b3bcbc6e3332d3f15e
194 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various PDF files under the guise of educational content. The primary redirector URL, https://ttraff.cc/wb?keyword=biomolecules%20chemistry%20class%2012%20pdf%20ncert, is identified as malicious. The document's structure and embedded links suggest a phishing or scam attempt to trick users into downloading potentially malicious content.

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=biomolecules%20chemistry%20class%2012%20pdf%20ncert In PDF document text
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdfIn PDF document text
    • http://files.kwongwingkwan.com/uploads/1/3/0/8/130813799/zijazawoxa.pdfIn PDF document text
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdfIn PDF document text
    • http://files.homesdomains.com/uploads/1/3/1/8/131871488/873ef.pdfIn PDF document text
    • http://files.enduringwords.org/uploads/1/3/0/7/130739503/4216710.pdfIn PDF document text
    • http://files.macklandscapemanagement.com/uploads/1/3/1/0/131070078/sikusavenuto.pdfIn PDF document text
    • http://files.bridgehousesarc.org/uploads/1/3/2/7/132710704/b8536d8.pdfIn PDF document text
    • http://files.roadiesrule.com/uploads/1/3/1/1/131164199/7b31fa1f3127cb.pdfIn PDF document text
    • http://files.astraknots.com/uploads/1/3/0/7/130739318/6b5af99d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dowixame.files.wordpress.com/2020/06/neravukigapuwasinexiduwe.pdfIn PDF document text
    • https://zuvijig.files.wordpress.com/2020/07/wopugulezimukibatez.pdfIn PDF document text
    • https://forenuxi.files.wordpress.com/2020/06/58953990111.pdfIn PDF document text
    • https://gebotapigi358268599.files.wordpress.com/2020/06/majeriduxabizu.pdfIn PDF document text
    • https://nakilopediv.files.wordpress.com/2020/06/nikizugix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.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_off00008570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 5612 bytes
SHA-256: fad77dc4895ea921e1e712034c9c036b20bc08a117703a67e509bb1bf67d2e3e
font_01_sfnt_off0000986d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986D 10180 bytes
SHA-256: 3581e7202b579c8e9dd523d72264d6ecb6c2099b8ce83f4fbd5ad04477df0358