Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d9ac8efb52adba…

MALICIOUS

PDF

54.4 KB Created: 2020-08-08 15:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f6d89400a4bbc69aadfa5a492f20d1 SHA-1: 9c0aee70b725448afade2042f514f9b266c02a14 SHA-256: 03d9ac8efb52adba5f586e44b8a104d87e2d55f58111d0bc8f650257fb70abe2
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, suggesting it is designed to lead users to malicious content under the guise of a free download. The embedded URL 'https://ttraff.cc/pify?keyword=plant+virology+pdf+free+download' is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to exploit users through deceptive content, potentially leading to further malicious downloads.

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=plant+virology+pdf+free+download
    • http://files.devinmitchell32scholarshipfund.com/uploads/1/3/1/4/131483423/2972176.pdf
    • http://files.livinglifeyellow.com/uploads/1/3/1/0/131070367/bofezubupanerulazulo.pdf
    • http://files.michaelsigler.com/uploads/1/3/1/6/131637853/fbd27829c.pdf
    • http://nerub.bccupcakery.com/uploads/1/3/0/7/130740178/vovul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakoximowukod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/win7_host_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/biwidukuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/nujonexotolurawulitudege.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/76487490741.pdf
    • http://files.tikejiri.people.ua.edu/uploads/1/3/2/6/132682862/cb8f2.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/dufasivegijajur.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/xulew.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/periodic_table_full_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/53761398459.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/akademia_driving_school_nyc_new_york_ny.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/counter_strike_classic_offensive_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/lirobojuvutizu.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_off000081a2.bin
f61eb48a37ea1163b7c6f4eb014cc55a517f93c40ca0033a9e69c0fd0711e9bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A2 5076 bytes
font_01_sfnt_off0000930c.bin
ad5d88a1161a74a12a5c2e51ac55a12475b204050ec11fa2bf0829899ba9ef84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930C 13528 bytes
font_02_sfnt_off0000be16.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE16 4324 bytes

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