Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec4bfa20100fbed…

MALICIOUS

PDF

47.9 KB Created: 2020-10-28 23:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c32c2d4fa8c1c9256608431741ea892a SHA-1: 1dcdea446ed83954711129c2e6c81b6aef758130 SHA-256: 4ec4bfa20100fbed57ab4179cad4d9be629a13ddfdf2e75c472d9400f15a3b73
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or SEO poisoning attempt. One of the primary links, https://ggtraff.ru/123?keyword=enlightenment+study+guide+pdf, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=enlightenment+study+guide+pdf
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/3740324.pdf
    • https://tanaxafim.weebly.com/uploads/1/3/4/5/134501517/b70fee4.pdf
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/e7642.pdf
    • https://vefozifus.weebly.com/uploads/1/3/4/3/134382693/sijumoragasakel.pdf
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/pesan.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/wopevoza.pdf
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/lelemunazixato.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/357a0f.pdf
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/jebok-navoloziv.pdf
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/8732589.pdf
    • https://puliwavigajog.weebly.com/uploads/1/3/4/4/134469254/b17711d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/evasion_de_impuestos_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/tatou_le_matou_1_guide_pedagogique.pdf
    • https://cdn.shopify.com/s/files/1/0501/0741/6743/files/aha_hypertension_guidelines_2020_ppt.pdf
    • https://s3.amazonaws.com/tadovu/58946650554.pdf
    • https://s3.amazonaws.com/rorives/caliper_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0507/1405/0720/files/isnt_she_lovely_fingerstyle.pdf
    • https://s3.amazonaws.com/zikeko/34815529307.pdf
    • https://cdn.shopify.com/s/files/1/0483/3227/5865/files/fred_perry_uk_size_guide.pdf
    • https://s3.amazonaws.com/wilugugo/fasivuzuledod.pdf
    • https://cdn.shopify.com/s/files/1/0479/4626/8828/files/3612363517.pdf
    • https://cdn.shopify.com/s/files/1/0483/5698/2937/files/agnostic_quote_life_of_pi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d41.bin
bb13d5e0b1eda13e87f07ebe559f70bdf2d9fcaaacd6992f5f689ae7999b69a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 5208 bytes
font_01_sfnt_off00008ee6.bin
4a97962dbc8f3da12535d9a0e749b403186c7a5760cc1377fc5dc101eb17ba43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE6 10284 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.