Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbdcaf985b169b7…

MALICIOUS

PDF

58.8 KB Created: 2020-10-20 02:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e8c3927750b08117da332d6af6546cd SHA-1: f053c7af50ee390e8e0ad9927687e519cba14a97 SHA-256: 9dbdcaf985b169b7e4fc615afb46375448ac3f547df41723450211d47267e5c9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious due to its function as a link farm, directing users to numerous external websites, including known malicious redirectors. The document body contains a keyword-rich string designed to appear as a legitimate resource, likely to attract search engine traffic and unsuspecting users. The embedded URLs and the overall structure strongly suggest an attempt to drive traffic to potentially harmful sites, possibly for phishing or malware distribution.

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://ggtraff.ru/123?keyword=cours+menuiserie+aluminium+pdf+maroc In PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/5647925.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/8602186.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/gogivuneliv.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8750ffe9e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8b5f4ed6a60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f8be96a8df8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f89f58475849.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/2992d.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8885570c927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8b2e0313aa1.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/af1b660a-0ffa-4334-9cd3-8afe2e296968/48625734565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22150829-7a77-4909-9605-a411c266720d/55393574609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ee1133-0dfe-4fe7-8e98-010cebff45e0/gupatimexosusor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b78714-d595-4a54-b47f-766e2784c8a9/juroxevowetolokakudeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fe5d87-dd8e-438d-be66-6defa675cf65/37898430885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7031/9509/files/xabozadulopupas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2414/6855/files/mapireveziwakagivugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5910/files/61249999372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/analyzing_graphs_science_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2055/3887/files/everyday_use_walker.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_off0000917d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917D 5208 bytes
SHA-256: 7ec57b2b05b5ad472e8812f81c8fa33e6e5b74cf05e6f369ce489ce4826665e6
font_01_sfnt_off0000a317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA317 11084 bytes
SHA-256: 92be264ff12e6849ad3d5011ba58445457ba25add099ba965030b94837800f4c
font_02_sfnt_off0000c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65F 16144 bytes
SHA-256: fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78

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