Malicious PDF — malware analysis report

Static analysis result for SHA-256 694b951bb19314bd…

MALICIOUS

PDF

50.1 KB Created: 2020-08-30 09:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de2a7b7abde648465358d59bf61376d SHA-1: 7d9917299f37173c6b0bdd191da714a98811fde0 SHA-256: 694b951bb19314bdbd9a20a744d01e94ac6d37cb2b836016e77744590a3e2165
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with 30 external PDF links, many of which are generated for SEO purposes. One of the primary links, 'https://ttraff.cc/wix?keyword=the+economist+screensaver+free+downl', is flagged as a malicious redirector. The document body also contains obfuscated text and the same malicious URL, suggesting an attempt to trick users into visiting malicious or unwanted content. No scripts were extracted, but the presence of a malicious redirector and a link farm indicates a phishing or content-luring attempt.

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.cc/wix?keyword=the+economist+screensaver+free+downl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_f0f6d74d10bc47bdb90ccbb503061549.pdf
    • https://static.usrfiles.com/ugd/dd4472_9c546780397a4c0e83e68504e0b9bf51.pdf
    • https://static.usrfiles.com/ugd/2b25b5_3db1533c527342ae92d58c3f0a9b3c0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0252aac7b25f41178d4ae09497bf6393.pdf
    • https://static.usrfiles.com/ugd/02beb7_1f695dc5eef3478f9948b91771783509.pdf
    • https://cdn.shopify.com/s/files/1/0441/1277/3272/files/xiwizizasadimawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/32861933415.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/warlock_unearthed_arcana.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9109/files/toefl_practice_test_reading.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/rimworld_hydroponics_layout.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/r_data_structures_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/mizabejekenimafosese.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/wewetu.pdf
    • https://static.usrfiles.com/ugd/2b25b5_0f024f17f3d143eb8115d033fe45364a.pdf
    • https://static.usrfiles.com/ugd/4bb894_1839801d9c1f4c98952dcbfafb660ff4.pdf
    • https://static.usrfiles.com/ugd/238140_d96dddc9846f465fa22be41d04aa5031.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_off000076c1.bin
73042b5244584cf07a283fdbb897994392481321aeba295e83ac485b7e046a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C1 5148 bytes
font_01_sfnt_off00008818.bin
f63a7cb3f5fc0d6986a6fb5ce7bcc7ce40aa0adec169e11ba5a9dd4fc8eb649a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8818 10436 bytes
font_02_sfnt_off0000abda.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABDA 4324 bytes

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