Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ffdc96d75523d5…

MALICIOUS

PDF

37.7 KB Created: 2020-08-06 21:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8addd676ccd775d7736bbf3b07346e07 SHA-1: 6c263a066a94ce9f256eaa8caf2c3f98c85f2e94 SHA-256: a2ffdc96d75523d59499fb52ab9d143f55f9deff1333ff4619c1e4f405ea4888
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, constituting a link farm. One of these links, 'https://ttraff.ru/pify?keyword=watermark+pdf+online+tool', is identified as a malicious redirector. The document body and metadata suggest it is designed to lure users into clicking these links under the guise of a PDF watermarking tool.

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=watermark+pdf+online+tool
    • http://files.alittletheologyontheprairie.com/uploads/1/3/1/4/131437446/f41a0b2a4.pdf
    • http://ripowibir.officeformations.com/uploads/1/3/0/7/130776262/pikegonajekini-fejasesopawo-xekamifivewiso-tujofozoko.pdf
    • http://files.elshaddaiswazi.org/uploads/1/3/0/8/130874431/mopulujigikuz_keriwazuvitox_benikanuvilof.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/jijifinozamewopigum.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/catalina_island_fishing.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0939/files/gapegawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/88412621267.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/55130689531.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7130/files/260397326.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/94006273738.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/panelimovoxamojipek.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/76482933942.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/pufifudepuxiramume.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005555.bin
8e8e700d7f81897d39a0cc929541f741edcd781ff00ca08a90d5dfc97d32aeb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5555 5088 bytes
font_01_sfnt_off000066a3.bin
a0e7d8f6e2b57180855d40621c8572caa17c988793a48e02f60a9bea1685e02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A3 10496 bytes

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