Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f8d32cdf050f18…

MALICIOUS

PDF

45.2 KB Created: 2020-08-23 23:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d60777786c645353c6ac1907e8e78fd SHA-1: dd75c1c9ef76a23849d795c95e8b6128468d530d SHA-256: 04f8d32cdf050f185416435dbfc5b2a86d911a535a01341eb0650b91d2e2971a
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 of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to trick users into visiting malicious websites, 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=blade+and+soul+mobile++ios
    • http://bogijo.erica-baltimore.org/uploads/1/3/0/9/130969162/37e3474c35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/multiple_of_23.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/rezuvamotadekonijajari.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/11086038678.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/90351313779.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/learning_spanish_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/9360554493.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/arabic_words_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/refrigeration_and_air_conditioning_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/honda_cbr1000rr_2008_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/luweruluxobuworodanefodu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/agribusiness_management_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0464/5198/2504/files/wondershare_dr._fone_for_android_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/76637745283.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/doviritapomovaxasezudizur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d3.bin
cc90847c17cc7e663fa75882935a0ee2a0f571151d45d71a0a8247d50586e10e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 3896 bytes
font_01_sfnt_off000073bf.bin
f0ae28fb8d385b38af4202358cdd4673afff604669c5376b04599818e1cc76bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BF 5064 bytes
font_02_sfnt_off000084df.bin
6ef17c0e10978aef39a6b5caeb04f1c95f71027f12ee021c1514e576b76a5c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 10372 bytes

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