Malicious PDF — malware analysis report

Static analysis result for SHA-256 074b5be9bcb5999f…

MALICIOUS

PDF

63.4 KB Created: 2020-08-10 22:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 841bd3333211ac4a0aec83f95ccbbb7d SHA-1: 779123b0058e032cae24a7500bd953d2df27deec SHA-256: 074b5be9bcb5999fce873b5e566c80b2e855af8047ebc218c6e85b564c7976fc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a Brexit agreement. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malicious content. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=brexit+agreement+full+text+pdf
    • http://files.westcommunityconnect.com/uploads/1/3/1/3/131379712/6085122.pdf
    • http://mogesef.archangelsschool.ca/uploads/1/3/1/1/131164250/145d99f.pdf
    • http://files.givingandreceivinginhealthcare.com/uploads/1/3/0/7/130739210/9741604.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/nolubigibuzisov.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/fofenimununuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/jukixala.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/playbook_barney_stinson_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/teluvazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/xoxonazujarujorasute.pdf
    • https://cdn.shopify.com/s/files/1/0436/9950/3257/files/xijudevuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/organic_chemistry_brown_iverson_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/l_abc_de_l_apiculture.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/22688276219.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/35453103342.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb0f.bin
d49154fee48a0c315a0bbb32afa4d6bba0f57be2b94fe46c37b649f5137b4872
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0F 5300 bytes
font_01_sfnt_off0000cd07.bin
73f2466c00a12f04af114d21292418824ffa2a7ebb552fb6f662bb61036caa83
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD07 10376 bytes