Malicious PDF — malware analysis report

Static analysis result for SHA-256 04479ddf5088401e…

MALICIOUS

PDF

95.5 KB Created: 2020-09-05 00:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 720e13f36327396041069a304d11a3e9 SHA-1: 306afd24dd7486850f209b7e79c85472b54ee6ed SHA-256: 04479ddf5088401e46bfe81eaacb57b1d565da2555ce1c4a7810670cead411bf
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many benign, indicates a link farm strategy to obscure the malicious intent.

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.club/wix?keyword=atmega8-+16pu+datasheet+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ab059d_e89eb40c403444fd883dd746c5086528.pdf
    • https://static.usrfiles.com/ugd/943725_29a34bdf5ebc4e33a6a80fe1ab2a6a7e.pdf
    • https://static.usrfiles.com/ugd/696b8a_446aa96a7007488db66e67cf749094e5.pdf
    • https://static.usrfiles.com/ugd/9219f8_76ef6be175fc42c09c71160a91dfb9a1.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_639c651a8f5d4f92a53fe7903f7326ad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/6th_grade_grammar_worksheets_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/vilefo.pdf
    • https://cdn.shopify.com/s/files/1/0449/9036/5864/files/batman_game_gba.pdf
    • https://static.usrfiles.com/ugd/b4a829_702cc51724384aceaccb0125237bc669.pdf
    • https://static.usrfiles.com/ugd/4b874d_a9abb66ba90b4db5a57a408b3ff7be97.pdf
    • https://static.usrfiles.com/ugd/913720_b73312353d274a178737773619b106ed.pdf
    • https://static.usrfiles.com/ugd/451a43_7327b93710d74937b6943a2c61facf85.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_c2c00f1e11764611a48f87d44b667afa.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bf3d8c6071a45e3a927d926aac3c04e.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012210.bin
0fd66a77cd0f2de52f83ace35deafcaf3e1c85b2c7c7f8ea1af84ad4115467de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 5748 bytes
font_01_sfnt_off0001358f.bin
6ec9c7d607b46f48f4b3d91bacc1e52a6de4c8a24e3db36111a62fff659ba195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1358F 11912 bytes
font_02_sfnt_off00015b78.bin
2def80ee9cf871b89fa1821d83521187f92649b88f41053709a5a2c79b3e7c85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B78 16132 bytes

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