Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fd64f7db2c62d8…

MALICIOUS

PDF

55.3 KB Created: 2020-07-27 07:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e69f930db904ac3502e251f5d5f736ac SHA-1: 32f1122231f49ec1d3945af81317b579f84737ba SHA-256: b2fd64f7db2c62d84fbe716062ae9740234f90356d07542b6e5293fcad0c1cf1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The ML classifier strongly supports the malicious nature of this PDF.

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=synthesis+of+cdse+quantum+dots+pdf
    • http://files.fatherheartcanada.com/uploads/1/3/1/3/131384301/kibudajevapaxe.pdf
    • http://files.woodyglenfarm.com/uploads/1/3/0/7/130776728/de3c362f2d6.pdf
    • http://files.wgscontemporary.com/uploads/1/3/1/3/131380995/f4424a.pdf
    • http://files.number38spa.com/uploads/1/3/1/4/131453998/5539493.pdf
    • http://files.sustainabilityiscool.com/uploads/1/3/0/7/130739891/a856abfa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/70979294086.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/nixez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3981/files/jixojofituzunazuvixesowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/mavuxituvevukaseku.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/57319061559.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/16389274296.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/menadovuxodudaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/sofatalawagamumujux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/87697919269.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/61713092068.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/10996099487.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/lipirabodopipelorulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/28293456757.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/56127960505.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_off00009801.bin
870e4a9ddad039154f4df252fe074e66bf5676fb8a50fb6561e86d328b0be752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9801 5480 bytes
font_01_sfnt_off0000aa77.bin
07dba7dd4930b77df74d7b65e8b1b0904e7ccee15317d0a5364e7f4edaeb3ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA77 10992 bytes

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