Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0556bfaf608ab50…

MALICIOUS

PDF

42.0 KB Created: 2020-11-01 20:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0650f92b139ad88b8468bdb23d915fab SHA-1: c7bd73d3219c28a85c42d6780fea6cad94d5ffb7 SHA-256: b0556bfaf608ab501282736e9f38dc9aab3db055ccf518cff85182c898ac6fd5
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains numerous embedded links, many pointing to disposable hosting. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that appears to be a lure for search engine traffic. The presence of multiple external links suggests a link farm or SEO manipulation tactic, potentially leading to malicious content or phishing pages.

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=spider+man+far+from+home+mp4+docs In PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/267f8673.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/9421603.pdfIn PDF document text
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/412c875307aaac7.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/5114437.pdfIn PDF document text
    • https://zufakuka.weebly.com/uploads/1/3/4/3/134343409/lunijasumejuze-nugiwimod-kapoji-nevevedive.pdfIn PDF document text
    • https://dujizozobalosu.weebly.com/uploads/1/3/4/4/134470010/kalefumofazuwakado.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/wenafijiwe.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/1/0434/0082/2934/files/13956325094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/like_and_dislike_exercises_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6766/2748/files/worksheets_printable_letter_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3603cb-3083-4d84-8868-6fa0bd665a51/buruduxojasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7967/7082/files/iowa_hawkeye_logo_jpg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b124e04-1409-43ed-8bb9-4e3f87e6b3ea/vanofiwukewe.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/michael_vey_the_prisoner_of_cell_25_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6791/5463/files/90325791547.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/biocentrismo_robert_lanza_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3294/9148/files/gesuposomagozigisomog.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_off00006406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 5556 bytes
SHA-256: 2776701995b950d95d333732e83e5d09c3ef8fe705c427c9c898a1fea852009c
font_01_sfnt_off000076c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 11232 bytes
SHA-256: 529c96ea73ecc47933b22be6eaa642c43294354dba6a80db7ca208feeee09ae5

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