Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a35a2bdca1eaf5b…

MALICIOUS

PDF

43.6 KB Created: 2020-10-15 03:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f26a0bd33ed977e18af714b28172e09e SHA-1: fe90485df7b17a94d8329f45f1d08e09a387205b SHA-256: 5a35a2bdca1eaf5b77c06ef7829f07c5a8524989d358c73f4c3056e18959cc08
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/pify?keyword=manual+de+alimentacion+saludable+peru In PDF document text
    • https://site-1043357.mozfiles.com/files/1043357/korijugujamewusagozijomiv.pdfIn PDF document text
    • https://site-1042541.mozfiles.com/files/1042541/66058235394.pdfIn PDF document text
    • https://site-1042554.mozfiles.com/files/1042554/mefoledawexaze.pdfIn PDF document text
    • https://site-1043246.mozfiles.com/files/1043246/tarimedamur.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/kiwugivulanotipabebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8704b3f0cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f876f6fbadd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8748647b4cd.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/3587330.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tamivejogu-fipurigewa-rofeku.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/86bd3b89c294ae.pdfIn PDF document text
    • https://site-1039566.mozfiles.com/files/1039566/69277591880.pdfIn PDF document text
    • https://site-1042104.mozfiles.com/files/1042104/44769612432.pdfIn PDF document text
    • https://site-1040428.mozfiles.com/files/1040428/93777920368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06562af5-e72c-439d-a809-0d87992da8af/lowom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9192d3-d810-4ecf-84e8-2c639c6393d2/59414415768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1abdc386-cb10-4a28-ae20-aea84d6bfd84/kigizok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c40678-e31b-44a0-993c-3bc835dd9754/95480860075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4544/1695/files/suzuki_violin_book_1_gavotte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2461/2509/files/radizunibimuza.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_off00006912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6912 5364 bytes
SHA-256: 43250f8a63a5d4b5584252958e226c824d6eb4700b3bd94ad6b2fd91ba52a5f8
font_01_sfnt_off00007b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 11272 bytes
SHA-256: 708f3bc760c54d5753707577b53359129c0f91e9c3dfcc15ccb2f29c819a2c17