Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a99590bf494ea5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 01:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ba2aa5eb25f4b61c93debc4d242c15 SHA-1: 1a3f5434fc0d0d93b9b7df8fc7950e302a2cc7e2 SHA-256: 80a99590bf494ea5fa805d4a8d8add597c390638516183658f63dc8bbc034428
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure the user to malicious sites, potentially for phishing or malware distribution.

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.ru/wb?keyword=industrial%20urbanisation%20pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • http://files.islandholisticsllc.com/uploads/1/3/1/4/131437380/fewenom-jirol-romame.pdf
    • http://files.macsmosaics.co.nz/uploads/1/3/0/7/130740242/ravokekuwi_bajuxipemoboji.pdf
    • http://files.emmagarriott.ca/uploads/1/3/2/6/132696155/5677e29659f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2218/7685/files/xedibaruxulefiril.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/zivofod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/tegakipujenadow.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/kapupurepazexinomobawoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/aldol_condensation_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/pangu_ios_9._2._1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/92195118678.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/furajoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/61675265648.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/strategic_management_notes_for_m._com.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/tactics_for_the_toeic_test_introductory_course.pdf
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/tejoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de4.bin
f42d9f6634dd08196f18677d5652ae817111efd1a806c21639f8ba9ac81fc832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE4 4876 bytes
font_01_sfnt_off00006e66.bin
6f279c9f18931f3882a994590ed4375cacfc34fd26a0df588e01079b398a9056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 9824 bytes
font_02_sfnt_off00008ffe.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFE 4324 bytes

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