Malicious PDF — malware analysis report

Static analysis result for SHA-256 129bdd3544682907…

MALICIOUS

PDF

50.3 KB Created: 2020-08-20 11:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 219a6f5ac2554885a5dc07f312cdd80a SHA-1: cb83895a94e996c43c000d1c310b1c909b0ca516 SHA-256: 129bdd35446829071f72fcc1ce4afa98b9bd0ea7c1be86f183ba57fbeddb5e8e
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=apex+launcher+apk+apkpure', is identified as a malicious redirector. The document body also contains this URL and other links, suggesting a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/pify?keyword=apex+launcher+apk+apkpure
    • http://temepev.stanalexander.com/uploads/1/3/0/7/130775052/junufulodoz.pdf
    • http://files.shannanstanciuforschoolboard.com/uploads/1/3/1/8/131856844/godit.pdf
    • http://files.mtm-inc.com/uploads/1/3/0/8/130874210/8036832.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/3309/4312/files/linajiwidaxelig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mogapusezonoxifetomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/mevasizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/tchaikovsky_symphony_6_score.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/mifudiwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/insert_file_into_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6964/3675/files/bioavailability_of_nutrients_for_animals.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004800.bin
6cf68f103658cab263248e9fe14ad1496f81743a626cfd948a703e85c47fe8da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4800 4964 bytes
font_01_sfnt_off000058cb.bin
b1f86a2bafbc3eecdff53dc53b097334b26f43bbc0c49675678ea8e4c16ed97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 12056 bytes
font_02_sfnt_off00008042.bin
1f80f257d1d4909062c9d0918e953c34f6f9f4afa0d8b2af16fd27257d5ebdcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8042 10364 bytes
font_03_sfnt_off0000a378.bin
177e4bc6e4ab2ede5960f4294af0055a8036e03ef2cafea94827eb274aa1e304		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA378 16600 bytes

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