Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d44eca84c9d296…

MALICIOUS

PDF

60.8 KB Created: 2020-08-06 10:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb41dff6037f9b93ab35e1d8eec33af SHA-1: 5ab4114de11cb414e84134b3d686fa3705b908f5 SHA-256: 10d44eca84c9d296769727348aa9ff52612b8bd206b5513a8ab4eb68e18f672b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating a malicious intent to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=arabic+numbers+1+1000+in+words+pdf
    • http://tegedexot.conniesclassictouch.com/uploads/1/3/1/4/131453674/8718713d66e68fd.pdf
    • http://files.bassriver-nj.org/uploads/1/3/2/6/132682585/didezedoxowu-pinulizawerinox-sabok-xepulo.pdf
    • http://dewixuj.savitzsmith.com/uploads/1/3/0/7/130738799/3c9764f578b.pdf
    • http://suvak.andovertheatre.org/uploads/1/3/0/9/130969060/jobukugok.pdf
    • http://files.hypnobabieswithlauren.com/uploads/1/3/1/1/131163853/zijonureposi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/sampoorna_marathi_aarti_sangrah_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43377474007.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/73743236222.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/bebejawoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/protection_of_domestic_violence_act.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/14316139828.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/44489159556.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/35235779530.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/zarex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/tedevokoxapudixajatuxib.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/livros_augusto_cury_armadilhas_da_mente.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/54991626184.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_off000074e7.bin
8f9816e85e5c00a61a6cdf4a39f92574fd0b0063356b25a8ffa0c43839adb2af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 5684 bytes
font_01_sfnt_off0000883b.bin
34d9fa796e88b8acac9a964040775a26252f41690b7a96ebeb581be9770e2ee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 15140 bytes
font_02_sfnt_off0000b67c.bin
9c51ee3bf6f9be673b5cb94f92e7b6242ad2d3a4f16417b574daca566061d2d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB67C 25300 bytes

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