Malicious PDF — malware analysis report

Static analysis result for SHA-256 1889f78ac7b27f8c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 12:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8dfe96e33b24e0c8220f49b7190d8ec SHA-1: 071ea5aedb8449bd4c2c0c635eea77bc42e36432 SHA-256: 1889f78ac7b27f8c56636e4a6e8460adf77a94be49c9b76bafb081b865acdc77
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and URLs, including a primary redirector URL. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites, 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/wix?keyword=pimpin+ken+48+laws+of+game+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/vetigewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6691/files/99141414990.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4865/files/83320385148.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0535/files/10649068583.pdf
    • https://cdn.shopify.com/s/files/1/0428/4320/9895/files/xigedapaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/classification_of_plants_and_animals_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/fruity_loops_studio_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/christmas_table_name_cards_templates.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d0dcc6942254291ad08b1dd63b43c85.pdf
    • https://static.usrfiles.com/ugd/538d67_f0ce069da4474cfb94f2863323632606.pdf
    • https://static.usrfiles.com/ugd/6908d7_cedd4fb6f5f8496ebd8e9d55eaae8eeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e334b50ff0814d4296a42551ef71dad4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa69dcda05904dac861d848e4ad6c543.pdf
    • https://static.usrfiles.com/ugd/26938b_d330315694ac44fbb112e6d420a47ba5.pdf
    • https://static.usrfiles.com/ugd/a771bd_0d2d0a78c99c4310becde5a6dd5ce9fe.pdf
    • https://static.usrfiles.com/ugd/3e9e83_0d5ed112050f4bfe94409b31b2bd6f61.pdf
    • https://static.usrfiles.com/ugd/0c4177_fea7d09ebf994be98ae92e24adaac510.pdf
    • https://static.usrfiles.com/ugd/ddb60a_44f3b7a6b58240549c7f3184e62152ef.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_off00006180.bin
484f39e19236fb22c9c2f5d492e4ec1040da679982d02454a5214bc0e7e3d283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 5704 bytes
font_01_sfnt_off000074f1.bin
747853747c080a7db193d794e729e8ad008e09da24f1ef4a79e74cdf0f34902d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F1 9972 bytes

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