Malicious PDF — malware analysis report

Static analysis result for SHA-256 2924a5ceadff4dea…

MALICIOUS

PDF

51.3 KB Created: 2020-08-12 14:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d53beb1d840e1b78b7f1a47aa12765 SHA-1: 8a1787d2cdd1df9581319ce8be019cda43e20fa6 SHA-256: 2924a5ceadff4dea9216f56703ec66b0ce5431e33163fa63f33174504c23add3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body contains text related to 'baixar free pdf compressor' and the malicious URL, indicating a lure to download or interact with malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly suggests the primary intent is to redirect users to harmful sites.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=baixar+free+pdf+compressor
    • http://files.baileykidsmusicals.com/uploads/1/3/0/7/130775275/fd76a9256b224.pdf
    • http://files.ridgechristiancentre.co.uk/uploads/1/3/0/8/130813732/4532602.pdf
    • http://niroxez.charlottechiphi.com/uploads/1/3/0/9/130969723/f1797.pdf
    • http://files.fleurspressed.com/uploads/1/3/1/6/131606343/mufububusolu_mojiwobun_fovegese.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/series_7_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/zixubovujasumupoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/18382385800.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/industrial_applications_of_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0451/3038/3514/files/jquery_ajax_ebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/66488454379.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/getiwukel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/budget_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/vozuvofoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/6891331576.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/kagan_mats.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d7e.bin
db3be934f7dc21220a02e8b0ad089b915a5c079929f05cd0d76b4408b80bba15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7E 4988 bytes
font_01_sfnt_off00008e70.bin
ea2da48a31969b1aeee68df509a86fe02c19fd14ad4af3a7de2e4ee711c38613
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 10356 bytes
font_02_sfnt_off0000b1ee.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EE 4324 bytes