Malicious PDF — malware analysis report

Static analysis result for SHA-256 877035873e20f1a1…

MALICIOUS

PDF

38.7 KB Created: 2020-08-20 01:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e07ba981bc5f1928189e3775fb8c9f64 SHA-1: db2f9bfa3db55219ddbd57fe56602af99332343c SHA-256: 877035873e20f1a107e3d03c2f5f12523ad98d44354ea243e6a67ba4778559b9
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 Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains the same malicious URL and appears to be a lure related to 'Dark Souls 3 piano sheet music'. This suggests the file is designed to redirect users to malicious infrastructure, likely for phishing or further malware delivery.

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://ttraff.ru/pify?keyword=dark+souls+3+epilogue+piano+sheet+music
    • http://files.boundtogethercounseling.com/uploads/1/3/2/6/132681901/jolewaxizor-zadinonenifa.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/1/3/131378899/1721378.pdf
    • http://sezigot.wteainfo.org/uploads/1/3/1/4/131407406/vakuzinixujubi-wijulem.pdf
    • http://files.cinderellacares.com/uploads/1/3/0/8/130814254/0ff16bcf4344.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/14967375993.pdf
    • https://cdn.shopify.com/s/files/1/0443/9700/2918/files/pocket_sand_meme.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/dmv_learners_permit_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/90358710466.pdf
    • https://cdn.shopify.com/s/files/1/0435/5067/1007/files/78918378528.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/bajrangi_bhaijaan_movie_songs_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/xaduladiwodurelu.pdf
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/elliptic_curve_arithmetic.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/37414926287.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/3492924926.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/catalogo_de_canceleria_de_aluminio.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/entrepreneurship_reference_books.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/roman_tales_alberto_moravia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://creativecommons.org/li
    • 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_off00004c55.bin
89daee645061683dc3588a59893550c69745036a4736eb6bf0728ceb6962e3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C55 5572 bytes
font_01_sfnt_off00005f24.bin
8694c0de32b4cc857c0ca0eb9b4b137363afa547f38e5be1270cf35412f74af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 14080 bytes

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