Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c585f4b1988df24…

MALICIOUS

PDF

33.2 KB Created: 2020-08-23 13:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350797d757b6f6d6acadc93bf1790f7b SHA-1: 26ea000eb2a034879258e697d4ea1a5e07ac78ee SHA-256: 0c585f4b1988df24baf84a33026d0a9f0b455c90f38c64cce7638ae24f7eee48
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.ru, which is disguised as a guide for the game 'Total War: Warhammer 2'. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, many hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to lure users to malicious infrastructure, likely for phishing or malware distribution.

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=tw+warhammer+2+alith+anar+guide
    • http://files.stmichaelskalida.org/uploads/1/3/1/3/131382470/manosa_merozatoxasix_moxek.pdf
    • http://files.ycvideos.com/uploads/1/3/0/9/130969153/ed03c3e9d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/1827022079.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7805/files/80943511643.pdf
    • https://cdn.shopify.com/s/files/1/0446/7281/1171/files/treatment_guidelines_for_asthma_attack.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/download_buku_akuntansi_perusahaan_jasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/aplasia_medular_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/bulk_up_fast_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/diagnostico_de_anemia_falciforme.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/javascript_array_methods.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/8904824378.pdf
    • https://cdn.shopify.com/s/files/1/0437/6166/4154/files/dujorobovemajavibes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0168/files/event_management_website_templates_free_s.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.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_off000047f2.bin
82ce7dbdb0672bdee8b16c09982005198b63384fbd1a9b1de1c09f8e89395573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F2 5232 bytes
font_01_sfnt_off000059a5.bin
752415d13fdae2a1efea9c0219ded7249bd9ffc2a33a05814141c06612b48a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A5 8956 bytes

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