Malicious PDF — malware analysis report

Static analysis result for SHA-256 7095788ff36f93a6…

MALICIOUS

PDF

51.5 KB Created: 2020-10-29 02:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: edfe50bd4fc365c6ac79067b9b796e5e SHA-1: 1d9fc62d2c8abc299a7fd5b3990c5b3476af4350 SHA-256: 7095788ff36f93a6458e135f891daace1f1a58eca3606f7fb785ec8fa1617c2f
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous URLs that redirect to various external sites. One of the embedded URLs, https://cctraff.ru/strik?keyword=google+sheets+put+borders, is flagged as malicious redirector infrastructure. The document's primary purpose appears to be directing users to potentially harmful content through this extensive network of links.

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://cctraff.ru/strik?keyword=google+sheets+put+borders In PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/51fac40b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f96f836180e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f950ae53542c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1498243.pdfIn PDF document text
    • https://fixupusojorulu.weebly.com/uploads/1/3/4/4/134438709/9016995.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/telitipoxuxobib_lipubal.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/0cbd7f35736ab.pdfIn PDF document text
    • https://vataviborabedim.weebly.com/uploads/1/3/4/0/134012391/xabixowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f91b8b2307f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f946a4e0b1b2.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/53c1aa89-22f6-4736-bbf9-5d0ea661c8a2/rizenimipipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc833fdf-98c4-4a95-ac46-7c762f4fcf33/60697227952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/49974345742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8445/7146/files/kali_linux_kernel_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31fb3d6-a8d7-4963-b54e-9e395fa037d2/pipekuvavejisuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ccad790-29f1-4024-96b1-f4487b38a22a/tefojutarolinabexujaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0747/5352/files/fire_emblem_heroes_iv.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000098c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x98C7 23540 bytes
SHA-256: 89aaa789d484aabf3f4dc102afba66ea0425d256de3b7457de0554b2d2762b94
font_00_sfnt_off000064e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 5184 bytes
SHA-256: c0582be5fa404dd28919a06429f335fb412145372927b15b447964c84e5225ad
font_01_sfnt_off00007678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7678 9952 bytes
SHA-256: 7ab80e56472f8dec8c4b6d84da7a6fa072e7ff24b99f168f893ff129a5defc25