Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf56c34cdcdc462…

MALICIOUS

PDF

42.3 KB Created: 2020-10-15 10:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 962238bdb32149537816cadedeb01034 SHA-1: e0cba255045d8fc5cef1377d3ce69fd5f3ebf503 SHA-256: 6cf56c34cdcdc4627ed1217ce635404a0b9d7cb08a83497782ac94750a93abdd
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=puffin+apk+download+apkpure In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/bokaxafixizan-wakodoxabuwo-tebamimisak.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/7442338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f87c7493d939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f875fd1155d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f875c147f1b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f8733a4a6d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f87f4286f4bc.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/13540003438.pdfIn PDF document text
    • https://site-1042103.mozfiles.com/files/1042103/xaludejugorozanuvu.pdfIn PDF document text
    • https://site-1043660.mozfiles.com/files/1043660/pezogawo.pdfIn PDF document text
    • https://site-1041613.mozfiles.com/files/1041613/sodekozabule.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/vekiviwuxunajuxi.pdfIn PDF document text
    • https://site-1038304.mozfiles.com/files/1038304/gilosut.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/54452176888.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/1/0495/4593/7048/files/telestrations_after_dark.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/lowazusekiribomoxanefin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/4259/9846/files/adapter_iphone_4_to_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2013/1745/files/nerd_camp_ct.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0798/5824/files/best_buy_alienware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4643/8565/files/backyard_travis_scott_lyrics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000527b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527B 5016 bytes
SHA-256: 80178edde72e1b8d99392bbaa45222115c31f61869c8ac062408ba0b2092fc2c
font_01_sfnt_off000063ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 10212 bytes
SHA-256: e03e3114f8ed37a8da34cf600378c51192d5a7c091143c35380f4eb4fd0e5c09
font_02_sfnt_off00008699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8699 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd